H.264 and H.265 unwatchable in browser and Jellyfin Media Player on my Mac

[dekomoon]

I think I should probably create a git issue on GitHub for my problems with Jellyfin Media Server.

However before that, does anyone know how to check what version of the FFmpeg/decoder Jellyfin Media Server uses for decoding? I am suspecting one of the reasons for the bad AV1 performance is because it is using an outdated software decoder version.