It’s a Plex alternative, I don’t know about better. IIRC it’s a fork of Emby. I try both (Emby and Jellyfin) usually a couple times a year, but there’s always something that gives me issue and I just stay with Plex.

Also, seems kind of silly, but the name is just dumb. Neither my wife or I want to audibly say “let’s watch something on Jellyfin”.