No, GPU passthrough is only possible if you have a graphic card which is not used by host OS (in case UHD is is used by the hist OS). As an alternative use spice monitor for you VM, allows full screen and is fast.
Sorry, I'm not very good with Linux and definitely can't comment.
I would like to install jellyfin or plex in a container and I would like to use my gpu for graphics acceleration and for external tv HDMI viewing. I can do it? Thanks for your time