Specifically from Rakuten TV (live.tv.rakuten.co.jp)
FMI: https://cdm-project.com/How-To/ & https://old.reddit.com/r/Piracy/comments/y30ffr/
- Install Tampermonkey: https://www.tampermonkey.net/
- Install yt-dlp: https://github.com/yt-dlp/yt-dlp#installation