Not sure if this is the place for it, but:

On my Quest 2 I can watch 4K, 6K, 7K, 8K HEVC 3D VR porn flawlessly using Skybox, either through Airscreen or Plex. Virtual Desktop handles the 4K stuff, too.

But when I just want to watch a measly 1080p (also HEVC) pancake movie, it's choppy as hell in Skybox or Virtual Desktop, whether through DLNA or their own media streaming options.

What gives? Anybody here know of any reasons and/or solutions?