[aexl]

I have proposed this some years ago (https://github.com/ytdl-org/youtube-dl/issues/14646), but it didn't get much attention from the maintainers. It has been previously rejected in 2013 already (https://github.com/ytdl-org/youtube-dl/issues/1185).

[colethedj]

yt-dlp does support "3rd party extractors" (in the form of plugins): https://github.com/yt-dlp/yt-dlp#plugins