I love Jellyfin, but its inability to Chromecast from iOS is a dealbreaker. I think they’re working on a whole new iOS app though that has a working chromecast button - https://github.com/jellyfin/Swiftfin
Sadly, Chromecast is essentially broken on Android too and has been for about a year. Stable version of the Chromecast plugin in the app is ancient and the nightly version doesn't work with stable server.
