There is an issue preventing the download of Watch Later playlists that has been open for over a year. The core maintainer, dstftw, closes all reports related to it with "duplicate" while never giving a reason or the original issue. See this issue I filed for an example.

https://github.com/ytdl-org/youtube-dl/issues/23860

He closed it without even addressing the issue of him closing the related issues that I explicitly brought up. There are scores of issues describing the same issue, but all of them are closed, and more of them are still being submitted. This has been going on since April of last year.

It's making me realize that sometimes a fork really is the only way to get around the problem that you're not in control of the project and there are bugs that many people need to be fixed.