Comment by leokennis

Both for simplicity and portability, I am a very happy user of https://firecore.com/infuse.

I guess it's less full featured as Plex or Jellyfin (it still more than covers the bases for video: format support, different video/audio/subtitle tracks, tv series recognition, skip intros, Trakt.tv etc.); but then again all it requires is any online storage, and the Infuse app (either on iDevice or AppleTV).