@nekohayo They won't even accept subtitles from people as a distributed effort.
I tried to submit some last year, but they refused. They said I should transcribe all the videos myself and set up a server for all videos and subtitles. (WHAT?!)
It's literally a tiny sidecar text file (.vtt) that should be included next to each video. It can be linked from their website.
It can be a distributed effort, and Whisper ( https://github.com/openai/whisper ) can even do most of the work in an automated way.