yt-dlc: youtube channel page downloads broken

Checklist

• I’m reporting a broken site support issue
• I’ve verified that I’m running youtube-dlc version 2020.10.31
• I’ve checked that all provided URLs are alive and playable in a browser
• I’ve checked that all URLs and arguments with special characters are properly quoted or escaped
• I’ve searched the bugtracker for similar bug reports including closed ones
• I’ve read bugs section in FAQ

Verbose log

youtube-dlc.exe --ignore-config -i -o "%(uploader)s (%(uploader_id)s)/%(upload_date)s - %(title)s - (%(duration)ss) [%(resolution)s] [%(id)s].%(ext)s" --prefer-ffmpeg --merge-output-format mkv --write-sub --all-subs --convert-subs srt --add-metadata --write-description --write-annotations --write-all-thumbnails --write-info-json --cookies youtube-cookies.txt -v --proxy "" https://www.youtube.com/channel/UC7qPftDWPw9XuExpSgfkmJQ
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--ignore-config', '-i', '-o', '%(uploader)s (%(uploader_id)s)/%(upload_date)s - %(title)s - (%(duration)ss) [%(resolution)s] [%(id)s].%(ext)s', '--prefer-ffmpeg', '--merge-output-format', 'mkv', '--write-sub', '--all-subs', '--convert-subs', 'srt', '--add-metadata', '--write-description', '--write-annotations', '--write-all-thumbnails', '--write-info-json', '--cookies', 'youtube-cookies.txt', '-v', '--proxy', '', 'https://www.youtube.com/channel/UC7qPftDWPw9XuExpSgfkmJQ']
[debug] Loading archive file None
[debug] Encodings: locale cp1252, fs utf-8, out utf-8, pref cp1252
[debug] youtube-dlc version 2020.11.07
[debug] Python version 3.9.0 (CPython) - Windows-10-10.0.19041-SP0
[debug] exe versions: ffmpeg git-2020-04-24-a501947, ffprobe git-2020-04-24-a501947
[debug] Proxy map: {}
[youtube:channel] UC7qPftDWPw9XuExpSgfkmJQ: Downloading channel page
[youtube:playlist] UU7qPftDWPw9XuExpSgfkmJQ: Downloading webpage
[download] Downloading playlist: UU7qPftDWPw9XuExpSgfkmJQ
[youtube:playlist] playlist UU7qPftDWPw9XuExpSgfkmJQ: Downloading 0 videos
[download] Finished downloading playlist: UU7qPftDWPw9XuExpSgfkmJQ

Description

youtube playlist downloads seem to have broken sometime within the last few hours. it was working earlier this morning, now all playlists result in “0 videos” from youtube-dlc. presumably youtube made a schema change which broke youtube-dlc.

Individual video downloads still work, for example this works perfectly:

youtube-dlc.exe --ignore-config -i -o “%(uploader)s (%(uploader_id)s)/%(upload_date)s - %(title)s - (%(duration)ss) [%(resolution)s] [%(id)s].%(ext)s” --prefer-ffmpeg --merge-output-format mkv --write-sub --all-subs --convert-subs srt --add-metadata --write-description --write-annotations --write-all-thumbnails --write-info-json --cookies youtube-cookies.txt -v --proxy “” https://www.youtube.com/watch?v=SXGAiTjFiMA