Three options you could explore: Tube Archivist (with plugin), Pinchflat and Toothpick.
(No personal experience in using Toothpick)
Create a separate library for YouTube contents, then TA or PF will create different ‘shows’ inside it. The TA plugin or PF built-in option to generate NFO files will prepare all metadata necessary for Jellyfin import. To separate the channels, you simply set them up separately in TA or PF then they will show as different ‘shows’. All these GUI applications are built on top of yt-dlp by the way.
RPG without only focusing on FPS. I quite don’t like ARPG these days that don’t have a good story but add a lot to combat mechanics.