Podman rootless Plex with H/W transcoding?

Hi all - recently moved my old docker setup across to Podman rootless containers, however I am having some trouble with getting my Plex container to use the on CPU hardware transcoding.

"/dev/dri" device is being passed into the container and after reading, I also added "--group-add=keep-groups" to my configuration.

Still no luck getting the "video" group to the plex user inside the container so it can access the device.

Anyone successfully running rootless Plex with H/W transcode?