cannot download from youtube

Please follow the guide below

You will be asked some questions and requested to provide some information, please read them carefully and answer honestly
Put an x into all the boxes [ ] relevant to your issue (like that [x])
Use Preview tab to see how your issue will actually look like

Make sure you are using the latest version: run `youtube-dl --version` and ensure your version is 2016.07.07. If it's not read this FAQ entry and update. Issues with outdated version will be rejected.

[x ] I've verified and I assure that I'm running youtube-dl 2016.07.07
Before submitting an issue make sure you have:
[ x] At least skimmed through README and most notably FAQ and BUGS sections
[ ] Searched the bugtracker for similar issues including closed ones
What is the purpose of your issue?
[ x] Bug report (encountered problems with youtube-dl)
[ ] Site support request (request for adding support for a new site)
[ ] Feature request (request for a new functionality)
[ ] Question
[ ] Other

The following sections concretize particular purposed issues, you can erase any section (the contents between triple ---) not applicable to 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 -v flag to your command line you run youtube-dl with, copy the whole output and insert it here. It should look similar to one below (replace it with your log inserted between triple ```):

$ youtube-dl -v <your command line>
C:\Users\Brian>ytdl -v https://www.youtube.com/watch?v=bvgfF-EMLaw
[debug] System config: []
[debug] User config: [u'--ffmpeg-location', u'C:\\Program Files (x86)\\Youtube Downloader\\FFMPEG\\bin', u'--audio-format', u'mp3', u'--embed-thumbnail', u'-x']
[debug] Command-line args: [u'-v', u'https://www.youtube.com/watch?v=bvgfF-EMLaw']
[debug] Encodings: locale cp1252, fs mbcs, out cp437, pref cp1252
[debug] youtube-dl version 2016.03.06
[debug] Python version 2.7.10 - Windows-8-6.2.9200
[debug] exe versions: ffmpeg N-79083-gc411e90, ffprobe N-79083-gc411e90
[debug] Proxy map: {}
[youtube] bvgfF-EMLaw: Downloading webpage
[youtube] bvgfF-EMLaw: Downloading video info webpage
[youtube] bvgfF-EMLaw: Extracting video information
[youtube] {22} signature length 40.45, html5 player en_US-vflYIVfbT
[youtube] bvgfF-EMLaw: Downloading player https://s.ytimg.com/yts/jsbin/player-en_US-vflYIVfbT/base.js
ERROR: Signature extraction failed: Traceback (most recent call last):
  File "youtube_dl\extractor\youtube.pyo", line 981, in _decrypt_signature
  File "youtube_dl\extractor\youtube.pyo", line 896, in _extract_signature_function
  File "youtube_dl\extractor\youtube.pyo", line 959, in _parse_sig_js
  File "youtube_dl\jsinterp.pyo", line 241, in extract_function
ExtractorError: Could not find JS function u'ur'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
 (caused by ExtractorError(u"Could not find JS function u'ur'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.",)); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
  File "youtube_dl\extractor\youtube.pyo", line 981, in _decrypt_signature
  File "youtube_dl\extractor\youtube.pyo", line 896, in _extract_signature_function
  File "youtube_dl\extractor\youtube.pyo", line 959, in _parse_sig_js
  File "youtube_dl\jsinterp.pyo", line 241, in extract_function
ExtractorError: Could not find JS function u'ur'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
  File "youtube_dl\YoutubeDL.pyo", line 668, in extract_info
  File "youtube_dl\extractor\common.pyo", line 319, in extract
  File "youtube_dl\extractor\youtube.pyo", line 1554, in _real_extract
  File "youtube_dl\extractor\youtube.pyo", line 991, in _decrypt_signature
ExtractorError: Signature extraction failed: Traceback (most recent call last):
  File "youtube_dl\extractor\youtube.pyo", line 981, in _decrypt_signature
  File "youtube_dl\extractor\youtube.pyo", line 896, in _extract_signature_function
  File "youtube_dl\extractor\youtube.pyo", line 959, in _parse_sig_js
  File "youtube_dl\jsinterp.pyo", line 241, in extract_function
ExtractorError: Could not find JS function u'ur'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
 (caused by ExtractorError(u"Could not find JS function u'ur'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.",)); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
...
<end of log>

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):

Single video: https://www.youtube.com/watch?v=BaW_jenozKc
Single video: https://youtu.be/BaW_jenozKc
Playlist: https://www.youtube.com/playlist?list=PL4lCao7KL_QFVb7Iudeipvc2BCavECqzc

Description of your issue, suggested solution and other information

when using the standard command to download a video from youtube, the above error is obtained and the download fails.

ytdl-org / youtube-dl

cannot download from youtube #10033

Please follow the guide below

Make sure you are using the latest version: run `youtube-dl --version` and ensure your version is 2016.07.07. 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?

The following sections concretize particular purposed issues, you can erase any section (the contents between triple ---) not applicable to 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:

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):

Description of your issue, suggested solution and other information

ytdl-org / youtube-dl

cannot download from youtube #10033

Please follow the guide below

Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2016.07.07. 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?

The following sections concretize particular purposed issues, you can erase any section (the contents between triple ---) not applicable to 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:

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):

Description of your issue, suggested solution and other information

Make sure you are using the latest version: run `youtube-dl --version` and ensure your version is 2016.07.07. If it's not read this FAQ entry and update. Issues with outdated version will be rejected.