Edit; oops, I thought you talked about both Apple and Android, I’m so used to ATV being Android tv. I might leave the comment anyway if it helps someone else.

For Android tv, if using the official app, I would recommend downloading “Just (Video) Player” and then configuring the Jellyfin app to use external player. On my Shield the videos play much better without transcoding

It appears to look at your listening history and then download new music from YouTube. So it’ll be new music you probably don’t have.

Well, if you learn about software development from reddit and Lemmy, that’s one thing. Not always representative of the real world.