[youtube] Extract `uploader` and `uploader_id` of multifeed playlist

[danielyli]

Checklist

• [X] I'm reporting a bug unrelated to a specific site
• [X] I've verified that I'm running yt-dlp version 2022.03.08.1. (update instructions)
• [X] I've checked that all provided URLs are alive and playable in a browser
• [X] I've checked that all URLs and arguments with special characters are properly quoted or escaped
• [X] I've searched the bugtracker for similar issues including closed ones. DO NOT post duplicates
• [X] I've read the guidelines for opening an issue

Description

Background info

When downloading a multifeed video, yt-dlp populates the uploader and uploader_id fields with NA instead of their actual values.

Example

For example, see these two videos:

https://www.youtube.com/watch?v=7jQ5wLZ6Pj4
https://www.youtube.com/watch?v=mp0TW8vkCLg

When downloading one of the videos, we see:

$ yt-dlp --skip-download --write-info-json --output '%(uploader)s-%(uploader_id)s.%(id)s.%(ext)s' 7jQ5wLZ6Pj4
(... etc ...)

$ ls *.info.json
NA-NA.7jQ5wLZ6Pj4.info.json
SpaceX-spacexchannel.7jQ5wLZ6Pj4.info.json
SpaceX-spacexchannel.mp0TW8vkCLg.info.json

Related issues

This feature request relates to #3306.

Verbose log

$ yt-dlp -vU --skip-download --write-info-json --output '%(uploader)s-%(uploader_id)s.%(id)s.%(ext)s' 7jQ5wLZ6Pj4
[debug] Command-line config: ['-vU', '--skip-download', '--write-info-json', '--output', '%(uploader)s-%(uploader_id)s.%(id)s.%(ext)s', '7jQ5wLZ6Pj4']
[debug] Encodings: locale UTF-8, fs utf-8, out utf-8, err utf-8, pref UTF-8
[debug] yt-dlp version 2022.03.08.2 [e491d06d3]
[debug] Python version 3.10.2 (CPython 64bit) - macOS-12.2.1-arm64-arm-64bit
[debug] exe versions: ffmpeg 5.0 (setts), ffprobe 5.0, rtmpdump 2.4
[debug] Optional libraries: brotli, Cryptodome, mutagen, sqlite, websockets
[debug] Proxy map: {}
Latest version: 2022.03.08.1, Current version: 2022.03.08.2
yt-dlp is up to date (2022.03.08.2)
[debug] [youtube] Extracting URL: 7jQ5wLZ6Pj4
[youtube] 7jQ5wLZ6Pj4: Downloading webpage
[youtube] 7jQ5wLZ6Pj4: Downloading android player API JSON
[youtube] Downloading multifeed video (mp0TW8vkCLg, 7jQ5wLZ6Pj4) - add --no-playlist to just download video 7jQ5wLZ6Pj4
[download] Downloading playlist: Iridium-5 Mission - Countdown Net - Audio Only
[info] Writing playlist metadata as JSON to: NA-NA.7jQ5wLZ6Pj4.info.json
[youtube] playlist Iridium-5 Mission - Countdown Net - Audio Only: Collected 2 videos; downloading 2 of them
[download] Downloading video 1 of 2
[debug] [youtube] Extracting URL: https://www.youtube.com/watch?v=mp0TW8vkCLg#__youtubedl_smuggle=%7B%22force_singlefeed%22%3A+true%7D
[youtube] mp0TW8vkCLg: Downloading webpage
[youtube] mp0TW8vkCLg: Downloading android player API JSON
[debug] Sort order given by extractor: quality, res, fps, hdr:12, source, codec:vp9.2, lang, proto
[debug] Formats sorted by: hasvid, ie_pref, quality, res, fps, hdr:12(7), source, vcodec:vp9.2(10), acodec, lang, proto, filesize, fs_approx, tbr, vbr, abr, asr, vext, aext, hasaud, id
[debug] Default format spec: bestvideo*+bestaudio/best
[info] mp0TW8vkCLg: Downloading 1 format(s): 248+251
[info] Writing video metadata as JSON to: SpaceX-spacexchannel.mp0TW8vkCLg.info.json
[download] Downloading video 2 of 2
[debug] [youtube] Extracting URL: https://www.youtube.com/watch?v=7jQ5wLZ6Pj4#__youtubedl_smuggle=%7B%22force_singlefeed%22%3A+true%7D
[youtube] 7jQ5wLZ6Pj4: Downloading webpage
[youtube] 7jQ5wLZ6Pj4: Downloading android player API JSON
[youtube] 7jQ5wLZ6Pj4: Downloading MPD manifest
[youtube] 7jQ5wLZ6Pj4: Downloading MPD manifest
[debug] Sort order given by extractor: quality, res, fps, hdr:12, source, codec:vp9.2, lang, proto
[debug] Formats sorted by: hasvid, ie_pref, quality, res, fps, hdr:12(7), source, vcodec:vp9.2(10), acodec, lang, proto, filesize, fs_approx, tbr, vbr, abr, asr, vext, aext, hasaud, id
[debug] Default format spec: bestvideo*+bestaudio/best
[info] 7jQ5wLZ6Pj4: Downloading 1 format(s): 248+251
[info] Writing video metadata as JSON to: SpaceX-spacexchannel.7jQ5wLZ6Pj4.info.json
[info] Writing updated playlist metadata as JSON to: NA-NA.7jQ5wLZ6Pj4.info.json
[download] Finished downloading playlist: Iridium-5 Mission - Countdown Net - Audio Only

$ ls *.info.json
NA-NA.7jQ5wLZ6Pj4.info.json
SpaceX-spacexchannel.7jQ5wLZ6Pj4.info.json
SpaceX-spacexchannel.mp0TW8vkCLg.info.json

[pukkandan]

yt-dlp populates the uploader and uploader_id fields with NA instead of their actual values.

The video's metadata is being populated correctly. You mean the uploader of the "playlist", correct?

Does anyone know if a multifeed can have multiple uploaders? If so, it doesn't make sense to extract an uploader for it. Otherwise, we can potentially extract the first video's uploader and use that

[coletdjnz]

Closing as YouTube has discontinued multi-feed videos.