Although Plex is running on your server it isn’t there to do what you want… unless Plex’s real owner permits it.
That’s how proprietary software works.
I’ve been in a multi year process to move my users off plex onto jellyfin. They just keep doing things I’m not a fan of
Jellyfin is absolute dogshit though.
Sauce: I just installed it on my media server that concurrently runs plex. I run the app on a fire tv cube to use it… and it crashes* constantly.
Edit: More stuff :)
-My media library when imported immediately showed seasons of shows as separate shows, it doesn’t intelligently automatically merge it like Plex would.
-Subtitle options are not consistent or robust. I MUST have subtitles due to having a multilingual family which is largely ESL, if they speak English at all. This is the problem I tried moving to jellyfin to fix.
Jellyfin is love, Jellyfin is life.
It’s bad. But it’s the best we’ve got.