Jellyfin on a small PC with a hardwire ethernet to a firestick connected to your tv would probably be your best bet.
Discussion
I have the server running already. I really just need a client
Firestick, or Roku or something. Then you can just bypass the tv software. https://www.amazon.com/Jellyfin-for-Fire-TV/dp/B07TX7Z725?dplnkId=7195e5e9-784c-4277-a9f4-8ae986d458e0