Live YouTube videos support

[WillPittenger]

Checklist

• [x] I'm reporting a site feature request
• [x] I've verified that I'm running youtube-dl version 2021.12.17
• [x] I've searched the bugtracker for similar site feature requests including closed ones

Description

How about the ability to record live videos from YouTube. Currently, you can try downloading the portion already on YouTube, but you only get the most recent 4 hours and no more. As for what hasn't happened yet, that's the end of file. What I had in mind was more like recording on a DVR from cable TV.

This should also work for videos marked "PREMIER" or "PREMIERING".

[dirkf]

This appears to be a research problem.

See #26330, #26290; also: https://github.com/yt-dlp/yt-dlp/issues/1564.

[LivreAcessoPro]

I see error with the option --get-thumbnail in scheduled lives.