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ytdl-org / youtube-dl

Command-line program to download videos from YouTube.com and other video sites
http://ytdl-org.github.io/youtube-dl/
The Unlicense
131.39k stars 9.96k forks source link

Youtube long playlist with some private/removed videos flaky behaviour #18048

Closed mellon85 closed 5 years ago

mellon85 commented 5 years ago

Please follow the guide below

Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2018.10.29. If it's not, read this FAQ entry and update. Issues with outdated version will be rejected.

Before submitting an issue make sure you have:

What is the purpose of your issue?

If the purpose of this issue is a bug report, site support request or you are not completely sure provide the full verbose output as follows:

Add the -v flag to your command line you run youtube-dl with (youtube-dl -v <your command line>), copy the whole output and insert it here. It should look similar to one below (replace it with your log inserted between triple ```):

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'-v', u'-i', u'https://www.youtube.com/playlist?list=PLHTh1InhhwT6V9RVdFRoCG_Pm5udDxG1c']
[debug] Encodings: locale UTF-8, fs UTF-8, out None, pref UTF-8
[debug] youtube-dl version 2018.10.29
[debug] Python version 2.7.15rc1 (CPython) - Linux-4.15.0-36-generic-x86_64-with-Ubuntu-18.04-bionic
[debug] exe versions: ffmpeg 3.4.2-2, ffprobe 3.4.2-2, phantomjs ., rtmpdump 2.4
[debug] Proxy map: {}
[youtube:playlist] PLHTh1InhhwT6V9RVdFRoCG_Pm5udDxG1c: Downloading webpage
[download] Downloading playlist: CppCon 2018
[youtube:playlist] PLHTh1InhhwT6V9RVdFRoCG_Pm5udDxG1c: Downloading page #1
[youtube:playlist] playlist CppCon 2018: Downloading 115 videos
[download] Downloading video 1 of 115
[youtube] HddFGPTAmtU: Downloading webpage
[youtube] HddFGPTAmtU: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Bjarne Stroustrup “Concepts - The Future of Generic Programming (the future is here)”-HddFGPTAmtU.mkv has already been downloaded and merged
[download] Downloading video 2 of 115
[youtube] 2YXwg0n9e7E: Downloading webpage
[youtube] 2YXwg0n9e7E: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Mark Elendt “Patterns and Techniques Used in the Houdini 3D Graphics Application ”-2YXwg0n9e7E.webm has already been downloaded and merged
[download] Downloading video 3 of 115
[youtube] n0Ak6xtVXno: Downloading webpage
[youtube] n0Ak6xtVXno: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Kate Gregory “Simplicity - Not Just For Beginners”-n0Ak6xtVXno.webm has already been downloaded and merged
[download] Downloading video 4 of 115
[youtube] 80BZxujhY38: Downloading webpage
[youtube] 80BZxujhY38: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Herb Sutter “Thoughts on a more powerful and simpler C++ (5 of N)”-80BZxujhY38.mkv has already been downloaded and merged
[download] Downloading video 5 of 115
[youtube] yZVby-PuXM0: Downloading webpage
[youtube] yZVby-PuXM0: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Kris Jusiak “State Machines Battlefield - Naive vs STL vs Boost”-yZVby-PuXM0.mp4 has already been downloaded and merged
[download] Downloading video 6 of 115
[youtube] _f7O3IfIR2k: Downloading webpage
[youtube] _f7O3IfIR2k: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Chandler Carruth “Spectre - Secrets, Side-Channels, Sandboxes, and Security”-_f7O3IfIR2k.mkv has already been downloaded and merged
[download] Downloading video 7 of 115
[youtube] mt_ULMnQ4_A: Downloading webpage
[youtube] mt_ULMnQ4_A: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - “Closing Panel - Spectre”-mt_ULMnQ4_A.webm has already been downloaded and merged
[download] Downloading video 8 of 115
[youtube] j9tlJAqMV7U: Downloading webpage
[youtube] j9tlJAqMV7U: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - G. Nishanov “Nano-coroutines to the Rescue! (Using Coroutines TS, of Course)”-j9tlJAqMV7U.webm has already been downloaded and merged
[download] Downloading video 9 of 115
[youtube] SCZLnopmYBM: Downloading webpage
[youtube] SCZLnopmYBM: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - 'Compiling Multi-Million Line C++ Code Bases Effortlessly with the Meson Build System'-SCZLnopmYBM.mp4 has already been downloaded and merged
[download] Downloading video 10 of 115
[youtube] -0tO3Eni2uo: Downloading webpage
[youtube] -0tO3Eni2uo: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Frederic Tingaud “A Little Order - Delving into the STL sorting algorithms”--0tO3Eni2uo.mp4 has already been downloaded and merged
[download] Downloading video 11 of 115
[youtube] CRDNPwXDVp0: Downloading webpage
[youtube] CRDNPwXDVp0: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Louis Dionne “Compile-time programming and reflection in C++20 and beyond”-CRDNPwXDVp0.mp4 has already been downloaded and merged
[download] Downloading video 12 of 115
[youtube] T_1zutIBHs0: Downloading webpage
[youtube] T_1zutIBHs0: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Victor Ciura “These Aren't the COM Objects You're Looking For”-T_1zutIBHs0.mkv has already been downloaded and merged
[download] Downloading video 13 of 115
[youtube] JXWziwvUzYI: Downloading webpage
[youtube] JXWziwvUzYI: Downloading video info webpage
WARNING: Unable to extract video title
ERROR: This video is unavailable.
Traceback (most recent call last):
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
    ie_result = ie.extract(url)
  File "./youtube-dl/youtube_dl/extractor/common.py", line 508, in extract
    ie_result = self._real_extract(url)
  File "./youtube-dl/youtube_dl/extractor/youtube.py", line 1897, in _real_extract
    raise ExtractorError(error_message, expected=True)
ExtractorError: This video is unavailable.

[download] Downloading video 14 of 115
[youtube] H0A7AeUxVUw: Downloading webpage
[youtube] H0A7AeUxVUw: Downloading video info webpage
WARNING: Unable to extract video title
ERROR: This video is unavailable.
Traceback (most recent call last):
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
    ie_result = ie.extract(url)
  File "./youtube-dl/youtube_dl/extractor/common.py", line 508, in extract
    ie_result = self._real_extract(url)
  File "./youtube-dl/youtube_dl/extractor/youtube.py", line 1897, in _real_extract
    raise ExtractorError(error_message, expected=True)
ExtractorError: This video is unavailable.

[download] Downloading video 15 of 115
[youtube] XPzHNSUnTc4: Downloading webpage
[youtube] XPzHNSUnTc4: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Jon Cohen “Ensuring Exception Safety Through Testing'-XPzHNSUnTc4.webm has already been downloaded and merged
[download] Downloading video 16 of 115
[youtube] _WPdof1dTqo: Downloading webpage
[youtube] _WPdof1dTqo: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Juan Manuel Martinez Caamaño “Easy - -Jit - A Just-in-Time compilation library for C++”-_WPdof1dTqo.webm has already been downloaded and merged
[download] Downloading video 17 of 115
[youtube] HIJTRrm9nzY: Downloading webpage
[youtube] HIJTRrm9nzY: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Michael Gopshtein “CUDA Kernels with C++”-HIJTRrm9nzY.mkv has already been downloaded and merged
[download] Downloading video 18 of 115
[youtube] 5FQ87-Ecb-A: Downloading webpage
[youtube] 5FQ87-Ecb-A: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Bob Steagall “Fast Conversion From UTF-8 with C++, DFAs, and SSE Intrinsics”-5FQ87-Ecb-A.mp4 has already been downloaded and merged
[download] Downloading video 19 of 115
[youtube] REIEaUY9np4: Downloading webpage
[youtube] REIEaUY9np4: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Peter Sommerlad “Sane and Safe C++ Classes”-REIEaUY9np4.webm has already been downloaded and merged
[download] Downloading video 20 of 115
[youtube] z6wKEJ-daD4: Downloading webpage
[youtube] z6wKEJ-daD4: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Morris Hafner 'UEFI Applications With Modern C++'-z6wKEJ-daD4.mkv has already been downloaded and merged
[download] Downloading video 21 of 115
[youtube] 0WgC5jnrRx8: Downloading webpage
[youtube] 0WgC5jnrRx8: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Steven Simpson “Source Instrumentation for Monitoring C++ in Production”-0WgC5jnrRx8.mp4 has already been downloaded and merged
[download] Downloading video 22 of 115
[youtube] 93Cjg42bGEw: Downloading webpage
[youtube] 93Cjg42bGEw: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Robert Ramey “Safe Numerics”-93Cjg42bGEw.mkv has already been downloaded and merged
[download] Downloading video 23 of 115
[youtube] 1fwbG5TyI18: Downloading webpage
[youtube] 1fwbG5TyI18: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Arno Lepisk “Avoiding Disasters with Strongly Typed C++”-1fwbG5TyI18.mp4 has already been downloaded and merged
[download] Downloading video 24 of 115
[youtube] 8nyq8SNUTSc: Downloading webpage
[youtube] 8nyq8SNUTSc: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Nir Friedman “Understanding Optimizers - Helping the Compiler Help You”-8nyq8SNUTSc.mp4 has already been downloaded and merged
[download] Downloading video 25 of 115
[youtube] cJP7SSLjvSI: Downloading webpage
[youtube] cJP7SSLjvSI: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Boris Kolpackov “What to Expect from a Next-Generation C++ Build System”-cJP7SSLjvSI.mp4 has already been downloaded and merged
[download] Downloading video 26 of 115
[youtube] kYVxGyido9g: Downloading webpage
[youtube] kYVxGyido9g: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Kate Gregory “What Do We Mean When We Say Nothing At All”-kYVxGyido9g.mkv has already been downloaded and merged
[download] Downloading video 27 of 115
[youtube] 6NAAuxWNhk4: Downloading webpage
[youtube] 6NAAuxWNhk4: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - “Latest and Greatest in the Visual Studio Family for C++ Developers 2018”-6NAAuxWNhk4.mkv has already been downloaded and merged
[download] Downloading video 28 of 115
[youtube] dxww44YlSZ0: Downloading webpage
[youtube] dxww44YlSZ0: Downloading video info webpage
WARNING: Unable to extract video title
ERROR: This video has been removed by the user
Traceback (most recent call last):
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
    ie_result = ie.extract(url)
  File "./youtube-dl/youtube_dl/extractor/common.py", line 508, in extract
    ie_result = self._real_extract(url)
  File "./youtube-dl/youtube_dl/extractor/youtube.py", line 1897, in _real_extract
    raise ExtractorError(error_message, expected=True)
ExtractorError: This video has been removed by the user

[download] Downloading video 29 of 115
[youtube] h60zqdzIelE: Downloading webpage
[youtube] h60zqdzIelE: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Victor Ciura “Regular Types and Why Do I Care ”-h60zqdzIelE.mkv has already been downloaded and merged
[download] Downloading video 30 of 115
[youtube] sBP17HQAQjk: Downloading webpage
[youtube] sBP17HQAQjk: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Robert Schumacher “Don't package your libraries, write packagable libraries!”-sBP17HQAQjk.mkv has already been downloaded and merged
[download] Downloading video 31 of 115
[youtube] WfIr7lKT4Sk: Downloading webpage
[youtube] WfIr7lKT4Sk: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Timur Doumler & Dmitry Kozhevnikov “Parsing C++”-WfIr7lKT4Sk.mkv has already been downloaded and merged
[download] Downloading video 32 of 115
[youtube] GC4cp4U2f2E: Downloading webpage
[youtube] GC4cp4U2f2E: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 -  Brand & Nash “What Could Possibly Go Wrong - A Tale of Expectations and Exceptions”-GC4cp4U2f2E.mp4 has already been downloaded and merged
[download] Downloading video 33 of 115
[youtube] LfRLQ7IChtg: Downloading webpage
[youtube] LfRLQ7IChtg: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Michael Caisse “Modern C++ in Embedded Systems - The Saga Continues”-LfRLQ7IChtg.mkv has already been downloaded and merged
[download] Downloading video 34 of 115
[youtube] zh4EgO13Etg: Downloading webpage
[youtube] zh4EgO13Etg: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Ben Deane “Operator Overloading - History, Principles and Practice”-zh4EgO13Etg.mkv has already been downloaded and merged
[download] Downloading video 35 of 115
[youtube] 2olsGf6JIkU: Downloading webpage
[youtube] 2olsGf6JIkU: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Jonathan Boccara “105 STL Algorithms in Less Than an Hour”-2olsGf6JIkU.mp4 has already been downloaded and merged
[download] Downloading video 36 of 115
[youtube] pnSvUbE1HHk: Downloading webpage
[youtube] pnSvUbE1HHk: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Patrice Roy “Pessimistic Programming”-pnSvUbE1HHk.mkv has already been downloaded and merged
[download] Downloading video 37 of 115
[youtube] YdzbrFerlRY: Downloading webpage
[youtube] YdzbrFerlRY: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Rishi Wani “Datum - A Compact Bitwise Copyable Variant Type”-YdzbrFerlRY.webm has already been downloaded and merged
[download] Downloading video 38 of 115
[youtube] POa_V15je8Y: Downloading webpage
[youtube] POa_V15je8Y: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Dan Saks “Making New Friends”-POa_V15je8Y.mp4 has already been downloaded and merged
[download] Downloading video 39 of 115
[youtube] PkyD1iv3ATU: Downloading webpage
[youtube] PkyD1iv3ATU: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Nicole Mazzuca “Value Semantics - Fast, Safe, and Correct by Default”-PkyD1iv3ATU.mkv has already been downloaded and merged
[download] Downloading video 40 of 115
[youtube] DcNYQ4qFpiI: Downloading webpage
[youtube] DcNYQ4qFpiI: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - William Clements “Save $$ Testing Code the Playback-Based Way”-DcNYQ4qFpiI.mkv has already been downloaded and merged
[download] Downloading video 41 of 115
[youtube] V1t6faOKjuQ: Downloading webpage
[youtube] V1t6faOKjuQ: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Greg Law “Debugging Linux C++”-V1t6faOKjuQ.mkv has already been downloaded and merged
[download] Downloading video 42 of 115
[youtube] nvfzQAUpunI: Downloading webpage
[youtube] nvfzQAUpunI: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - “TheLandscape and Exciting New Future of Safe Reclamation for High Performance”-nvfzQAUpunI.mkv has already been downloaded and merged
[download] Downloading video 43 of 115
[youtube] xwP4YCP_0q0: Downloading webpage
[youtube] xwP4YCP_0q0: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Victor Ciura “Enough string_view to Hang Ourselves”-xwP4YCP_0q0.mp4 has already been downloaded and merged
[download] Downloading video 44 of 115
[youtube] 3AkPd9Nt2Aw: Downloading webpage
[youtube] 3AkPd9Nt2Aw: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Christopher Di Bella “How to Teach C++ and Influence a Generation”-3AkPd9Nt2Aw.mkv has already been downloaded and merged
[download] Downloading video 45 of 115
[youtube] Nni2Qu2WitY: Downloading webpage
[youtube] Nni2Qu2WitY: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - “C++ Dependency Management - from Package Consumption to Project Development”-Nni2Qu2WitY.mkv has already been downloaded and merged
[download] Downloading video 46 of 115
[youtube] FJIn1YhPJJc: Downloading webpage
[youtube] FJIn1YhPJJc: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Bryce Adelstein Lelbach “The C++ Execution Model”-FJIn1YhPJJc.mp4 has already been downloaded and merged
[download] Downloading video 47 of 115
[youtube] Vj2vuoPJNfE: Downloading webpage
[youtube] Vj2vuoPJNfE: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Michael Price “Concepts and Contracts - When, What, and How”-Vj2vuoPJNfE.mkv has already been downloaded and merged
[download] Downloading video 48 of 115
[youtube] uCybqSX1idU: Downloading webpage
[youtube] uCybqSX1idU: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Arno Schoedl “Range-Based Text Formatting For a Future Range-Based Standard Library”-uCybqSX1idU.mkv has already been downloaded and merged
[download] Downloading video 49 of 115
[youtube] J4A2B9eexiw: Downloading webpage
[youtube] J4A2B9eexiw: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Simon Brand “How to Write Well-Behaved Value Wrappers”-J4A2B9eexiw.webm has already been downloaded and merged
[download] Downloading video 50 of 115
[youtube] 75LcDvlEIYw: Downloading webpage
[youtube] 75LcDvlEIYw: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Olivier Giroux “High-Radix Concurrent C++”-75LcDvlEIYw.mp4 has already been downloaded and merged
[download] Downloading video 51 of 115
[youtube] 0DDrseUomfU: Downloading webpage
[youtube] 0DDrseUomfU: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Simon Brand “How C++ Debuggers Work”-0DDrseUomfU.webm has already been downloaded and merged
[download] Downloading video 52 of 115
[youtube] n4Yf2tBeAbE: Downloading webpage
[youtube] n4Yf2tBeAbE: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - “Secure Coding Best Practices - Your First Line Is The Last Line Of Defense (1 of 2)”-n4Yf2tBeAbE.mp4 has already been downloaded and merged
[download] Downloading video 53 of 115
[youtube] i0m0FBD-McY: Downloading webpage
[youtube] i0m0FBD-McY: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - “Secure Coding Best Practices - Your First Line Is The Last Line Of Defense (2 of 2)”-i0m0FBD-McY.mkv has already been downloaded and merged
[download] Downloading video 54 of 115
[youtube] aAFRxRznVjQ: Downloading webpage
[youtube] aAFRxRznVjQ: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Alisdair Meredith “Contract Programming in C++(20) (part 1 of 2)”-aAFRxRznVjQ.mkv has already been downloaded and merged
[download] Downloading video 55 of 115
[youtube] 7RWJQLpmrS0: Downloading webpage
[youtube] 7RWJQLpmrS0: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Alisdair Meredith “Contract Programming in C++(20) (part 2 of 2)”-7RWJQLpmrS0.webm has already been downloaded and merged
[download] Downloading video 56 of 115
[youtube] ijh3Tse5L8s: Downloading webpage
[youtube] ijh3Tse5L8s: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Crafting EDSL In C++ using Metaprogramming, Operator Overloading, & Lambda Expressions-ijh3Tse5L8s.mkv has already been downloaded and merged
[download] Downloading video 57 of 115
[youtube] Ob5_XZrFQH0: Downloading webpage
[youtube] Ob5_XZrFQH0: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Phil Nash “Modern C++ Testing with Catch2”-Ob5_XZrFQH0.mp4 has already been downloaded and merged
[download] Downloading video 58 of 115
[youtube] xTdeZ4MxbKo: Downloading webpage
[youtube] xTdeZ4MxbKo: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Titus Winters “Modern C++ Design (part 1 of 2)”-xTdeZ4MxbKo.mkv has already been downloaded and merged
[download] Downloading video 59 of 115
[youtube] aqo79DFZrs8: Downloading webpage
[youtube] aqo79DFZrs8: Downloading video info webpage
WARNING: Unable to extract video title
ERROR: This video has been removed by the user
Traceback (most recent call last):
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
    ie_result = ie.extract(url)
  File "./youtube-dl/youtube_dl/extractor/common.py", line 508, in extract
    ie_result = self._real_extract(url)
  File "./youtube-dl/youtube_dl/extractor/youtube.py", line 1897, in _real_extract
    raise ExtractorError(error_message, expected=True)
ExtractorError: This video has been removed by the user

[download] Downloading video 60 of 115
[youtube] ekdWbrLXM7I: Downloading webpage
[youtube] ekdWbrLXM7I: Downloading video info webpage
WARNING: Unable to extract video title
ERROR: This video has been removed by the user
Traceback (most recent call last):
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
    ie_result = ie.extract(url)
  File "./youtube-dl/youtube_dl/extractor/common.py", line 508, in extract
    ie_result = self._real_extract(url)
  File "./youtube-dl/youtube_dl/extractor/youtube.py", line 1897, in _real_extract
    raise ExtractorError(error_message, expected=True)
ExtractorError: This video has been removed by the user

[download] Downloading video 61 of 115
[youtube] qNAbGpV1ZkU: Downloading webpage
[youtube] qNAbGpV1ZkU: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Fabian Renn-Giles “A Semi Compile_Run-time Map with (Nearly) Zero Overhead Lookup”-qNAbGpV1ZkU.mkv has already been downloaded and merged
[download] Downloading video 62 of 115
[youtube] xkxo0lah51s: Downloading webpage
[youtube] xkxo0lah51s: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Jean-Louis Leroy “Open is Good - yomm2 - Fast, Orthogonal Open Methods”-xkxo0lah51s.mkv has already been downloaded and merged
[download] Downloading video 63 of 115
[youtube] JME1i3vCRR8: Downloading webpage
[youtube] JME1i3vCRR8: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Rong Lu “What's new in Visual Studio Code for C++ development”-JME1i3vCRR8.mp4 has already been downloaded and merged
[download] Downloading video 64 of 115
[youtube] G33yF26UGMo: Downloading webpage
[youtube] G33yF26UGMo: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - “Multi-Precision Arithmetic for Cryptology in C++, at Run-Time and at Compile-Time”-G33yF26UGMo.webm has already been downloaded and merged
[download] Downloading video 65 of 115
[youtube] CVg7CYVV3KI: Downloading webpage
[youtube] CVg7CYVV3KI: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Serge Guelton “C++ in Elvenland”-CVg7CYVV3KI.mkv has already been downloaded and merged
[download] Downloading video 66 of 115
[youtube] DUEkxJ9YxMY: Downloading webpage
[youtube] DUEkxJ9YxMY: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Pablo Halpern “Using Compile-time Code Generation to build an LLVM IR Pattern Matcher”-DUEkxJ9YxMY.mkv has already been downloaded and merged
[download] Downloading video 67 of 115
[youtube] 4X_fZkl7kkU: Downloading webpage
[youtube] 4X_fZkl7kkU: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Victor Ciura “Better Tools in Your Clang Toolbox'-4X_fZkl7kkU.mkv has already been downloaded and merged
[download] Downloading video 68 of 115
[youtube] fChDijocVec: Downloading webpage
[youtube] fChDijocVec: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Marc Gregoire “Writing Standard Library Compliant Data Structures and Algorithms”-fChDijocVec.mp4 has already been downloaded and merged
[download] Downloading video 69 of 115
[youtube] yy8jQgmhbAU: Downloading webpage
[youtube] yy8jQgmhbAU: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Stoyan Nikolov “OOP Is Dead, Long Live Data-oriented Design”-yy8jQgmhbAU.mp4 has already been downloaded and merged
[download] Downloading video 70 of 115
[youtube] CXn02MPkn8Y: Downloading webpage
[youtube] CXn02MPkn8Y: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Arthur O'Dwyer “Concepts As She Is Spoke”-CXn02MPkn8Y.mp4 has already been downloaded and merged
[download] Downloading video 71 of 115
[youtube] NIDEjY5ywqU: Downloading webpage
[youtube] NIDEjY5ywqU: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Walter E. Brown “C++ Function Templates - How Do They Really Work”-NIDEjY5ywqU.mkv has already been downloaded and merged
[download] Downloading video 72 of 115
[youtube] IejdKidUwIg: Downloading webpage
[youtube] IejdKidUwIg: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Arthur O'Dwyer “An Allocator is a Handle to a Heap”-IejdKidUwIg.mkv has already been downloaded and merged
[download] Downloading video 73 of 115
[youtube] THDpfWG5T7Y: Downloading webpage
[youtube] THDpfWG5T7Y: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Jon Cohen & Matt Kulukundis “Touring the Tips of the Week Series”-THDpfWG5T7Y.webm has already been downloaded and merged
[download] Downloading video 74 of 115
[youtube] 7DTlWPgX6zs: Downloading webpage
[youtube] 7DTlWPgX6zs: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Nicolai Josuttis “The Nightmare of Initialization in C++”-7DTlWPgX6zs.mkv has already been downloaded and merged
[download] Downloading video 75 of 115
[youtube] uQyT-5iWUow: Downloading webpage
[youtube] uQyT-5iWUow: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Jason Turner “Surprises in Object Lifetime”-uQyT-5iWUow.mkv has already been downloaded and merged
[download] Downloading video 76 of 115
[youtube] oOZN6GqfdTs: Downloading webpage
[youtube] oOZN6GqfdTs: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Andrew Nelson “Funqual - user-defined statically-checked call graph constraints in C++”-oOZN6GqfdTs.mp4 has already been downloaded and merged
[download] Downloading video 77 of 115
[youtube] vA5sdxbwUG8: Downloading webpage
[youtube] vA5sdxbwUG8: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Serge Guelton “Frozen data structures in C++14”-vA5sdxbwUG8.mkv has already been downloaded and merged
[download] Downloading video 78 of 115
[youtube] S4QSKLXdTtA: Downloading webpage
[youtube] S4QSKLXdTtA: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Mateusz Pusz “Git, CMake, Conan - How to ship and reuse our C++ projects”-S4QSKLXdTtA.mp4 has already been downloaded and merged
[download] Downloading video 79 of 115
[youtube] L_QKlAx31Pw: Downloading webpage
[youtube] L_QKlAx31Pw: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Simon Brand “Overloading - The Bane of All Higher-Order Functions”-L_QKlAx31Pw.mp4 has already been downloaded and merged
[download] Downloading video 80 of 115
[youtube] IupP8AFrOJk: Downloading webpage
[youtube] IupP8AFrOJk: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Patricia Aas “Make It Fixable - Preparing for Security Vulnerability Reports”-IupP8AFrOJk.mkv has already been downloaded and merged
[download] Downloading video 81 of 115
[youtube] XEXpwis_deQ: Downloading webpage
[youtube] XEXpwis_deQ: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Barbara Geller & Ansel Sermersheim “Undefined Behavior is Not an Error”-XEXpwis_deQ.mkv has already been downloaded and merged
[download] Downloading video 82 of 115
[youtube] COEv2kq_Ht8: Downloading webpage
[youtube] COEv2kq_Ht8: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - James McNellis “Unwinding the Stack - Exploring How C++ Exceptions Work on Windows”-COEv2kq_Ht8.mkv has already been downloaded and merged
[download] Downloading video 83 of 115
[youtube] O1sK__G5Nrg: Downloading webpage
[youtube] O1sK__G5Nrg: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Peter Sommerlad “Woes of Scope Guards and Unique_Resource - 5+ years in the making”-O1sK__G5Nrg.mkv has already been downloaded and merged
[download] Downloading video 84 of 115
[youtube] 7Jk1a4cnukQ: Downloading webpage
[youtube] 7Jk1a4cnukQ: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Guy Davidson “Lightweight 2D graphics with io2d”-7Jk1a4cnukQ.mkv has already been downloaded and merged
[download] Downloading video 85 of 115
[youtube] eGWM_dI5egQ: Downloading webpage
[youtube] eGWM_dI5egQ: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Anastasiia Kazakova “Debug C++ Without Running”-eGWM_dI5egQ.mkv has already been downloaded and merged
[download] Downloading video 86 of 115
[youtube] aU3mU2eHwj8: Downloading webpage
[youtube] aU3mU2eHwj8: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Panel 'Grill the Committee”-aU3mU2eHwj8.webm has already been downloaded and merged
[download] Downloading video 87 of 115
[youtube] 67OCoOLVuK8: Downloading webpage
[youtube] 67OCoOLVuK8: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - “Emulating the Nintendo 3DS - Generative & Declarative Programming in Action'-67OCoOLVuK8.mp4 has already been downloaded and merged
[download] Downloading video 88 of 115
[youtube] PH4WBuE1BHI: Downloading webpage
[youtube] PH4WBuE1BHI: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Andrei Alexandrescu “Expect the expected”-PH4WBuE1BHI.mp4 has already been downloaded and merged
[download] Downloading video 89 of 115
[youtube] FaQDLfY087Q: Downloading webpage
[youtube] FaQDLfY087Q: Downloading video info webpage
WARNING: Unable to extract video title
ERROR: This video is unavailable.
Traceback (most recent call last):
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
    ie_result = ie.extract(url)
  File "./youtube-dl/youtube_dl/extractor/common.py", line 508, in extract
    ie_result = self._real_extract(url)
  File "./youtube-dl/youtube_dl/extractor/youtube.py", line 1897, in _real_extract
    raise ExtractorError(error_message, expected=True)
ExtractorError: This video is unavailable.

[download] Downloading video 90 of 115
[youtube] ckY7Pc-A9Xc: Downloading webpage
[youtube] ckY7Pc-A9Xc: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Borislav Stanimirov “DynaMix - A New Take on Polymorphism”-ckY7Pc-A9Xc.mkv has already been downloaded and merged
[download] Downloading video 91 of 115
[youtube] tn7oVNrPM8I: Downloading webpage
[youtube] tn7oVNrPM8I: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Titus Winters “Modern C++ Design (part 2 of 2)”-tn7oVNrPM8I.mkv has already been downloaded and merged
[download] Downloading video 92 of 115
[youtube] hA1WNtNyNbo: Downloading webpage
[youtube] hA1WNtNyNbo: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Arthur O'Dwyer “Return Value Optimization - Harder Than It Looks”-hA1WNtNyNbo.mkv has already been downloaded and merged
[download] Downloading video 93 of 115
[youtube] oK7hdBoxRcs: Downloading webpage
[youtube] oK7hdBoxRcs: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[download] CppCon 2018 - Stephen Dewhurst “Talking to Typelists”-oK7hdBoxRcs.mp4 has already been downloaded and merged
[download] Downloading video 94 of 115
[youtube] VY83afAJUIg: Downloading webpage
[youtube] VY83afAJUIg: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] CppCon 2018 - Tom Poole “Why and How to Roll Your Own std - -function Implementation”-VY83afAJUIg.mkv has already been downloaded and merged
[download] Downloading video 95 of 115
[youtube] nlxA7CWfy78: Downloading webpage
[youtube] nlxA7CWfy78: Downloading video info webpage
WARNING: Unable to extract video title
ERROR: This video is unavailable.
Traceback (most recent call last):
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
    ie_result = ie.extract(url)
  File "./youtube-dl/youtube_dl/extractor/common.py", line 508, in extract
    ie_result = self._real_extract(url)
  File "./youtube-dl/youtube_dl/extractor/youtube.py", line 1897, in _real_extract
    raise ExtractorError(error_message, expected=True)
ExtractorError: This video is unavailable.

[download] Downloading video 96 of 115
[youtube] QDvic0QNtOY: Downloading webpage
[youtube] QDvic0QNtOY: Downloading video info webpage
WARNING: Unable to extract video title
ERROR: This video is unavailable.
Traceback (most recent call last):
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
    ie_result = ie.extract(url)
  File "./youtube-dl/youtube_dl/extractor/common.py", line 508, in extract
    ie_result = self._real_extract(url)
  File "./youtube-dl/youtube_dl/extractor/youtube.py", line 1897, in _real_extract
    raise ExtractorError(error_message, expected=True)
ExtractorError: This video is unavailable.

[download] Downloading video 97 of 115
[youtube] lLEcbXidK2o: Downloading webpage
[youtube] lLEcbXidK2o: Downloading video info webpage
WARNING: Unable to extract video title
ERROR: This video is unavailable.
Traceback (most recent call last):
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
    ie_result = ie.extract(url)
  File "./youtube-dl/youtube_dl/extractor/common.py", line 508, in extract
    ie_result = self._real_extract(url)
  File "./youtube-dl/youtube_dl/extractor/youtube.py", line 1897, in _real_extract
    raise ExtractorError(error_message, expected=True)
ExtractorError: This video is unavailable.

[download] Downloading video 98 of 115
[youtube] _nIET46ul6E: Downloading webpage
[youtube] _nIET46ul6E: Downloading video info webpage
WARNING: Unable to extract video title
ERROR: This video is unavailable.
Traceback (most recent call last):
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
    ie_result = ie.extract(url)
  File "./youtube-dl/youtube_dl/extractor/common.py", line 508, in extract
    ie_result = self._real_extract(url)
  File "./youtube-dl/youtube_dl/extractor/youtube.py", line 1897, in _real_extract
    raise ExtractorError(error_message, expected=True)
ExtractorError: This video is unavailable.

[download] Downloading video 99 of 115
[youtube] bfm9m3xJQRY: Downloading webpage
[youtube] bfm9m3xJQRY: Downloading video info webpage
WARNING: Unable to extract video title
ERROR: This video is unavailable.
Traceback (most recent call last):
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
    ie_result = ie.extract(url)
  File "./youtube-dl/youtube_dl/extractor/common.py", line 508, in extract
    ie_result = self._real_extract(url)
  File "./youtube-dl/youtube_dl/extractor/youtube.py", line 1897, in _real_extract
    raise ExtractorError(error_message, expected=True)
ExtractorError: This video is unavailable.

[download] Downloading video 100 of 115
[youtube] 9ek3QIk8qTY: Downloading webpage
[youtube] 9ek3QIk8qTY: Downloading video info webpage
WARNING: Unable to extract video title
ERROR: This video is unavailable.
Traceback (most recent call last):
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
    ie_result = ie.extract(url)
  File "./youtube-dl/youtube_dl/extractor/common.py", line 508, in extract
    ie_result = self._real_extract(url)
  File "./youtube-dl/youtube_dl/extractor/youtube.py", line 1897, in _real_extract
    raise ExtractorError(error_message, expected=True)
ExtractorError: This video is unavailable.

[download] Downloading video 101 of 115
[youtube] hdRpCo94_C4: Downloading webpage
[youtube] hdRpCo94_C4: Downloading video info webpage
WARNING: Unable to extract video title
ERROR: This video is unavailable.
Traceback (most recent call last):
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
    ie_result = ie.extract(url)
  File "./youtube-dl/youtube_dl/extractor/common.py", line 508, in extract
    ie_result = self._real_extract(url)
  File "./youtube-dl/youtube_dl/extractor/youtube.py", line 1897, in _real_extract
    raise ExtractorError(error_message, expected=True)
ExtractorError: This video is unavailable.

[download] Downloading video 102 of 115
[youtube] Grveezn0zhU: Downloading webpage
[youtube] Grveezn0zhU: Downloading video info webpage
WARNING: Unable to extract video title
ERROR: This video is unavailable.
Traceback (most recent call last):
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
    ie_result = ie.extract(url)
  File "./youtube-dl/youtube_dl/extractor/common.py", line 508, in extract
    ie_result = self._real_extract(url)
  File "./youtube-dl/youtube_dl/extractor/youtube.py", line 1897, in _real_extract
    raise ExtractorError(error_message, expected=True)
ExtractorError: This video is unavailable.

[download] Downloading video 103 of 115
[youtube] xi2lTaC5p0I: Downloading webpage
[youtube] xi2lTaC5p0I: Downloading video info webpage
WARNING: Unable to extract video title
ERROR: This video is unavailable.
Traceback (most recent call last):
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
    ie_result = ie.extract(url)
  File "./youtube-dl/youtube_dl/extractor/common.py", line 508, in extract
    ie_result = self._real_extract(url)
  File "./youtube-dl/youtube_dl/extractor/youtube.py", line 1897, in _real_extract
    raise ExtractorError(error_message, expected=True)
ExtractorError: This video is unavailable.

[download] Downloading video 104 of 115
[youtube] gKbORJtnVu8: Downloading webpage
[youtube] gKbORJtnVu8: Downloading video info webpage
WARNING: Unable to extract video title
ERROR: This video is unavailable.
Traceback (most recent call last):
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
    ie_result = ie.extract(url)
  File "./youtube-dl/youtube_dl/extractor/common.py", line 508, in extract
    ie_result = self._real_extract(url)
  File "./youtube-dl/youtube_dl/extractor/youtube.py", line 1897, in _real_extract
    raise ExtractorError(error_message, expected=True)
ExtractorError: This video is unavailable.

[download] Downloading video 105 of 115
[youtube] OF3MIreVeh0: Downloading webpage
[youtube] OF3MIreVeh0: Downloading video info webpage
WARNING: Unable to extract video title
ERROR: This video has been removed by the user
Traceback (most recent call last):
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
    ie_result = ie.extract(url)
  File "./youtube-dl/youtube_dl/extractor/common.py", line 508, in extract
    ie_result = self._real_extract(url)
  File "./youtube-dl/youtube_dl/extractor/youtube.py", line 1897, in _real_extract
    raise ExtractorError(error_message, expected=True)
ExtractorError: This video has been removed by the user

[download] Downloading video 106 of 115
[youtube] tUBUqJSGr54: Downloading webpage
[youtube] tUBUqJSGr54: Downloading video info webpage
WARNING: Unable to extract video title
ERROR: This video is unavailable.
Traceback (most recent call last):
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
    ie_result = ie.extract(url)
  File "./youtube-dl/youtube_dl/extractor/common.py", line 508, in extract
    ie_result = self._real_extract(url)
  File "./youtube-dl/youtube_dl/extractor/youtube.py", line 1897, in _real_extract
    raise ExtractorError(error_message, expected=True)
ExtractorError: This video is unavailable.

[download] Downloading video 107 of 115
[youtube] nOpwhTbulmk: Downloading webpage
[youtube] nOpwhTbulmk: Downloading video info webpage
WARNING: Unable to extract video title
ERROR: This video is unavailable.
Traceback (most recent call last):
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
    ie_result = ie.extract(url)
  File "./youtube-dl/youtube_dl/extractor/common.py", line 508, in extract
    ie_result = self._real_extract(url)
  File "./youtube-dl/youtube_dl/extractor/youtube.py", line 1897, in _real_extract
    raise ExtractorError(error_message, expected=True)
ExtractorError: This video is unavailable.

[download] Downloading video 108 of 115
[youtube] JhUxIVf1qok: Downloading webpage
[youtube] JhUxIVf1qok: Downloading video info webpage
WARNING: Unable to extract video title
ERROR: This video is unavailable.
Traceback (most recent call last):
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
    ie_result = ie.extract(url)
  File "./youtube-dl/youtube_dl/extractor/common.py", line 508, in extract
    ie_result = self._real_extract(url)
  File "./youtube-dl/youtube_dl/extractor/youtube.py", line 1897, in _real_extract
    raise ExtractorError(error_message, expected=True)
ExtractorError: This video is unavailable.

[download] Downloading video 109 of 115
[youtube] sjnp3P9x5jA: Downloading webpage
[youtube] sjnp3P9x5jA: Downloading video info webpage
WARNING: Unable to extract video title
ERROR: This video is unavailable.
Traceback (most recent call last):
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
    ie_result = ie.extract(url)
  File "./youtube-dl/youtube_dl/extractor/common.py", line 508, in extract
    ie_result = self._real_extract(url)
  File "./youtube-dl/youtube_dl/extractor/youtube.py", line 1897, in _real_extract
    raise ExtractorError(error_message, expected=True)
ExtractorError: This video is unavailable.

[download] Downloading video 110 of 115
[youtube] Xd4NVV-Uy0I: Downloading webpage
[youtube] Xd4NVV-Uy0I: Downloading video info webpage
WARNING: Unable to extract video title
ERROR: This video is unavailable.
Traceback (most recent call last):
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
    ie_result = ie.extract(url)
  File "./youtube-dl/youtube_dl/extractor/common.py", line 508, in extract
    ie_result = self._real_extract(url)
  File "./youtube-dl/youtube_dl/extractor/youtube.py", line 1897, in _real_extract
    raise ExtractorError(error_message, expected=True)
ExtractorError: This video is unavailable.

[download] Downloading video 111 of 115
[youtube] m25p3EtBua4: Downloading webpage
[youtube] m25p3EtBua4: Downloading video info webpage
WARNING: Unable to extract video title
ERROR: This video is unavailable.
Traceback (most recent call last):
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
    ie_result = ie.extract(url)
  File "./youtube-dl/youtube_dl/extractor/common.py", line 508, in extract
    ie_result = self._real_extract(url)
  File "./youtube-dl/youtube_dl/extractor/youtube.py", line 1897, in _real_extract
    raise ExtractorError(error_message, expected=True)
ExtractorError: This video is unavailable.

[download] Downloading video 112 of 115
[youtube] WBTNCYT20f0: Downloading webpage
[youtube] WBTNCYT20f0: Downloading video info webpage
WARNING: Unable to extract video title
ERROR: This video is unavailable.
Traceback (most recent call last):
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
    ie_result = ie.extract(url)
  File "./youtube-dl/youtube_dl/extractor/common.py", line 508, in extract
    ie_result = self._real_extract(url)
  File "./youtube-dl/youtube_dl/extractor/youtube.py", line 1897, in _real_extract
    raise ExtractorError(error_message, expected=True)
ExtractorError: This video is unavailable.

[download] Downloading video 113 of 115
[youtube] s5PCh_FaMfM: Downloading webpage
[youtube] s5PCh_FaMfM: Downloading video info webpage
WARNING: Unable to extract video title
ERROR: This video is unavailable.
Traceback (most recent call last):
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
    ie_result = ie.extract(url)
  File "./youtube-dl/youtube_dl/extractor/common.py", line 508, in extract
    ie_result = self._real_extract(url)
  File "./youtube-dl/youtube_dl/extractor/youtube.py", line 1897, in _real_extract
    raise ExtractorError(error_message, expected=True)
ExtractorError: This video is unavailable.

[download] Downloading video 114 of 115
[youtube] 76uHxUi6L5g: Downloading webpage
[youtube] 76uHxUi6L5g: Downloading video info webpage
WARNING: Unable to extract video title
ERROR: This video is unavailable.
Traceback (most recent call last):
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
    ie_result = ie.extract(url)
  File "./youtube-dl/youtube_dl/extractor/common.py", line 508, in extract
    ie_result = self._real_extract(url)
  File "./youtube-dl/youtube_dl/extractor/youtube.py", line 1897, in _real_extract
    raise ExtractorError(error_message, expected=True)
ExtractorError: This video is unavailable.

[download] Downloading video 115 of 115
[youtube] UEuA0yuw_O0: Downloading webpage
[youtube] UEuA0yuw_O0: Downloading video info webpage
WARNING: Unable to extract video title
ERROR: This video is unavailable.
Traceback (most recent call last):
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
    ie_result = ie.extract(url)
  File "./youtube-dl/youtube_dl/extractor/common.py", line 508, in extract
    ie_result = self._real_extract(url)
  File "./youtube-dl/youtube_dl/extractor/youtube.py", line 1897, in _real_extract
    raise ExtractorError(error_message, expected=True)
ExtractorError: This video is unavailable.

[download] Finished downloading playlist: CppCon 2018

If the purpose of this issue is a site support request please provide all kinds of example URLs support for which should be included (replace following example URLs by yours):

The download of this playlist has 2 problems:

dstftw commented 5 years ago
  1. Wrong. 115 is the number of unique videos as this playlist contains duplicates, namely 81-83, 94-96.
  2. Wrong. As clearly seen from your log 88 videos have been downloaded that is perfectly correct since there are 27 private/removed videos in this playlist giving 115-27=88 unique downloadable videos. Bother to check before filing invalid reports.