[YouTube] Only the latest 30 videos from a channel is retrieved when a cookie is provided.

[MinkiNTN]

Checklist

• I'm reporting a broken site support issue
• I've verified that I'm running youtube-dl version 2020.11.12
• 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

H:\YouTubeArchive\Kanata>youtube-dl --version
2020.11.12

H:\YouTubeArchive\Kanata>youtube-dl -v -f "bestvideo[ext=mp4]+bestaudio[ext=m4a]" --merge-output-format mkv --write-thumbnail --write-description --write-info-json --write-annotations --add-metadata --download-archive "archive.txt" -i -o "[%(uploader)s][%(upload_date)s] %(title)s (%(id)s)/%(id)s.%(ext)s" --cookies=cookies.txt --playlist-reverse  https://www.youtube.com/channel/UCZlDXzGoo7d44bwdNObFacg/videos
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-v', '-f', 'bestvideo[ext=mp4]+bestaudio[ext=m4a]', '--merge-output-format', 'mkv', '--write-thumbnail', '--write-description', '--write-info-json', '--write-annotations', '--add-metadata', '--download-archive', 'archive.txt', '-i', '-o', '[%(uploader)s][%(upload_date)s] %(title)s (%(id)s)/%(id)s.%(ext)s', '--cookies=cookies.txt', '--playlist-reverse', 'https://www.youtube.com/channel/UCZlDXzGoo7d44bwdNObFacg/videos']
[debug] Encodings: locale cp1252, fs mbcs, out cp437, pref cp1252
[debug] youtube-dl version 2020.11.12
[debug] Python version 3.4.4 (CPython) - Windows-10-10.0.19041
[debug] exe versions: ffmpeg 4.3, ffprobe 4.3
[debug] Proxy map: {}
[youtube:tab] UCZlDXzGoo7d44bwdNObFacg: Downloading webpage
[download] Downloading playlist: Kanata Ch. Kanata Amane - Videos
[youtube:tab] Downloading page 1
[youtube:tab] playlist Kanata Ch. Kanata Amane - Videos: Downloading 30 videos
[download] Downloading video 1 of 30
[download] 三つ葉の結びめ／AZKi & 天音かなた(Cover) has already been recorded in archive
[download] Downloading video 2 of 30
[download] 【同時視聴】歌ってみたコラボ投稿だあああ！！！【AZKi＆天音かなた/ホロライブ】 has already been recorded in archive
[download] Downloading video 3 of 30
[download] 【2週間ぶり!?】ただいま～～！！！【天音かなた/ホロライブ4期生】 has already been recorded in archive
[download] Downloading video 4 of 30
[download] 【げつよる歌枠】Good bye★GETSUYOU★【天音かなた/ホロライブ4期生】 has already been recorded in archive
[download] Downloading video 5 of 30
[download] 【PP雑談？】事故に遭ったけど退院しました【天音かなた/ホロライブ4期生】 has already been recorded in archive
[download] Downloading video 6 of 30
[download] 【Minecraft】ホロ鯖で天使のおうちを充実させる！！【天音かなた/ホロライブ4期生】 has already been recorded in archive
[download] Downloading video 7 of 30
[download] 【Minecraft】透明な天使の橋を作りたい！！！【天音かなた/ホロライブ4期生】 has already been recorded in archive
[download] Downloading video 8 of 30
[download] 【壺男】BATTLE!!!! VS COCO　1時間併走バトル【天音かなた/ホロライブ4期生】 has already been recorded in archive
[download] Downloading video 9 of 30
[download] 【歌リングフィット】寝起き5秒で即配信！！！！【天音かなた/ホロライブ4期生】 has already been recorded in archive
[download] Downloading video 10 of 30
[download] 【Minecraft】共同作業！！【星街すいせい＆天音かなた/ホロライブ】 has already been recorded in archive
[download] Downloading video 11 of 30
[download] 【Minecraft】月の館の2Fを作る！！！【天音かなた/ホロライブ4期生】 has already been recorded in archive
[download] Downloading video 12 of 30
[download] 【#げつよる歌枠】singing YEAH★【天音かなた/ホロライブ4期生】 has already been recorded in archive
[download] Downloading video 13 of 30
[download] 【Minecraft】石石いししし！！！！【天音かなた/ホロライブ4期生】 has already been recorded in archive
[download] Downloading video 14 of 30
[download] 【モーリーオンライン】ぺこマリゲットだぜ！【天音かなた/ホロライブ4期生】 has already been recorded in archive
[download] Downloading video 15 of 30
[download] 【Minecraft】⭐#星の彼方DAY 開会式！！！！⭐【ホロライブ】 has already been recorded in archive
[download] Downloading video 16 of 30
[download] 【リングフィット】⭐星の彼方DAY #3　全力で運動！！！⭐【ホロライブ】 has already been recorded in archive
[download] Downloading video 17 of 30
[download] 月陽-ツキアカリ-／星街すいせい＆天音かなた(Cover) has already been recorded in archive
[download] Downloading video 18 of 30
[download] 【壺おじ並走】⭐星の彼方DAY #5　負けたら高級肉奢り⭐【ホロライブ】 has already been recorded in archive
[download] Downloading video 19 of 30
[download] 【壺おじ並走】⭐星の彼方DAY #5　負けたら高級肉奢り⭐【ホロライブ】 has already been recorded in archive
[download] Downloading video 20 of 30
[download] 【アソビ大全】⭐星の彼方DAY⭐ #8 リベンジだぜ！！！！！【ホロライブ】 has already been recorded in archive
[download] Downloading video 21 of 30
[download] 【げつよる歌枠】HAPPY MONDAY!!!!!!!!!!【天音かなた/ホロライブ4期生】 has already been recorded in archive
[download] Downloading video 22 of 30
[download] OMGGGGGGGGGGGGGGGGGGGGGGGGGGG has already been recorded in archive
[download] Downloading video 23 of 30
[download] 【Minecraft】すいちゃんにプレゼントその１【天音かなた/ホロライブ4期生】 has already been recorded in archive
[download] Downloading video 24 of 30
[download] 【Minecraft】月の館の看板作る！！！！【天音かなた/ホロライブ4期生】 has already been recorded in archive
[download] Downloading video 25 of 30
[download] MAD風マサオくん /MASAO's MAD has already been recorded in archive
[download] Downloading video 26 of 30
[download] 【Minecraft】すいちゃん看板完成！！！！【天音かなた/ホロライブ4期生】 has already been recorded in archive
[download] Downloading video 27 of 30
[download] 【げつよる歌枠】天城越え回　SINGING!!!!!【天音かなた/ホロライブ4期生】 has already been recorded in archive
[download] Downloading video 28 of 30
[download] 【Minecraft】運動会の準備どんどん進める！！！【ホロライブ/天音かなた】 has already been recorded in archive
[download] Downloading video 29 of 30
[download] 【GTA5】バグらないで！！【ホロライブ/天音かなた】 has already been recorded in archive
[download] Downloading video 30 of 30
[download] 【げつよる歌枠】SING Fooooooo!!!【ホロライブ/天音かなた】 has already been recorded in archive
[download] Finished downloading playlist: Kanata Ch. Kanata Amane - Videos

Description

When trying to download all videos a channel has, if a cookie file is provided, only the top 30 latest videos are returned. This only start appearing with version 2020.11.12, and if I remove cookie=cookies.txt from the command, all videos (specifically 254 for the channel in the log) are downloaded.