[youtube] channel's `/videos` URL return no videos

Checklist

• I'm reporting a broken site support
• I've verified that I'm running youtube-dl nightly version 2025.11.26
• 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 issues including closed ones

Verbose log

>youtube-dl --flat-playlist --get-title --get-id -v https://www.youtube.com/channel/UCO570reC1zAvYbwIU9ubGGw/videos
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--flat-playlist', '--get-title', '--get-id', '-v', 'https://www.youtube.com/channel/UCO570reC1zAvYbwIU9ubGGw/videos']
[debug] Encodings: locale cp1252, fs mbcs, out cp850, pref cp1252
[debug] youtube-dl version 2025.11.26 [956b8c585] (single file build)
[debug] ** This version was built from the latest master code at https://github.com/ytdl-org/youtube-dl.
[debug] ** For support, visit the main site.
[debug] Python 3.4.4 (CPython AMD64 32bit) - Windows-10-10.0.26100 - OpenSSL 1.0.2d 9 Jul 2015
[debug] exe versions: ffmpeg n5.1.6-9-gdcdfd7fb62-20241109, ffprobe n5.1.6-9-gdcdfd7fb62-20241109
[debug] Proxy map: {}

Description

Trying to list a channel's videos with the /videos URL returns zero videos now. It used to work, but I don't know how long ago it broke.

For what it's worth, the /playlists URL still works. (I mean, partially. That continuation issue is still there, but that doesn't apply for this channel.)