[GordonS]

I mainly use Plex, but every now and then there is a file that it won't play on my Samsung TV. Sometimes it will play the se file on another TV I have, an old Sony.

I also have Jellyfin installed and serving up the same collection of media for exactly this reason - sometimes it plays stuff that Plex won't. But the Plex app on my Samsung TV is far superior to the generic DLNA app I use for Jellyfin (I can't even remember the name of it; I tried multiple, and none were even close to as nice as the Plex one).