I abandoned jellyfin shortly into my self hosting setup. Plex just worked, with Jellyfin I spent an hour trying to figure out how to get it to serve an acceptable to Firefox codec and never succeeded. I’m sure with more effort I could have figured out what the magic combination was, but it wasn’t obvious and I had too many other things to set up.
About a year ago, and I don’t recall the specifics. I remember combing through trancode logs and not being able to figure out a path forward. I’m sure I could have solved it given enough time, but failing to play on Firefox or provide a clear solution was enough to convince me that the Wife Approval Factor was going to be too low.