Planning on having Emby in a VM . . .

Pointer: you wanna do "GPU passthrough".

There is a bunch of info on this (pci passthrough) on the wiki and a couple pages back on this forum section there are a bunch of threads about it.

Afaik IGP passthrough (your case) is tricker (have not seen it done on proxmox). Quick google revealed some hits for Arch Linux and ubuntu (did not read em indepth) success stories.