Docker

My python script works pretty well if I do say so myself but I'm pretty biased lol. It matches things up pretty well since it will use filenames of the actual media content or the different ids that it gets fro IMDb or whatever other providers you have available. The filenames should work pretty consistently assuming you are running Plex and jellyfin on the exact same library and the IDs should work if you are keeping different servers with different files in sync.