I prefer Jellyfin over Plex. Plex has become too bloated. Jellyfin is free, open-source, and well maintained. I have it running on Docker on my NAS, feeding multiple devices, accessible on every platform I use, and it hasn't failed me. I was a lifetime subscriber of Plex before I made the switch, and haven't looked back.
LTT did a great video about Jellyfin. Keep in mind that this video is 5 months old, and they have had updates since.
You should really brush up on your history. It's estimated that up to 77,000 Germans who were a part of the resistance were executed and an additional 800,000 were arrested. You're right that Nazis didn't kill other Nazis, they killed Germans who resisted Nazism.
https://archive.org/details/encyclopediaofge0000unse_i6r5/page/n5/mode/2up