I regularly play UHD HDR content I ripped from my blu-ray collection to my 4k AppleTV over 1Gbs Ethernet. I use the Infuse app instead of Plex, no stutters, no issues, looks great!
sidebar: I've had a lot of problems with the AppleTV plex app, it does not play some HDR content well, or at all. Plex on my nVidia Shield works well.
sidebar: I've had a lot of problems with the AppleTV plex app, it does not play some HDR content well, or at all. Plex on my nVidia Shield works well.