If you are setup like me, your containers are nested as such: (L1) PVE Host [ (L2) LXC Container running Docker Engine [ (L3) Jellyfin docker container ]]
- At L1, run command #chmod -R 777 /dev/dri to open up access
- Configure L2 (through the LXC .conf) to mount /dev/dri/card0 and /dev/dri/...