ref an earlier issue.
Are there any plans to enable quicksync hardware acceleration?

I think i saw a discussion on this somewhere that the issue is that the path for this is not always the same, so a simple

    devices:
      - "/dev/dri:/dev/dri"

would not work on all hardware, so some other "smarts" would be needed to figure out what should be added to the container.

The lack of quicksync seriously kneecaps the usefulness of Umbrel for home server uses.
At least in my opinion home media server is a staple of home server workloads.