I used to use this to make media available to a PlayStation 3. It can do on-the-fly conversion for codecs that aren't supported by the client, though I think Plex can do that kind of thing too.

Nowadays, I use TinyMediaManager to tag all my film and series and make them available to a Raspberry Pi running Kodi/Libreelec. I also tried using JellyFin as there's a good Kodi plugin for that, but prefer giving the Kodi box direct access to the files - seems to work better for keeping its library up to date.