I’m able to play 8k 360 videos at 100mb/s (H.265) in Quest 2 using third party apps.
I have not been successful in Unreal Engine 4.27.
I’ve only been able to play 4k 360 at 40mb/s (mono) using the Unreal Engine’s media player. I’ve been able to get better resolution with 8k photos by creating a sphere mesh in Maya and inverting normals. I then import the sphere apply the media texture to the sphere and am able to play both photos (8k) and videos (4k).
Even using this method the play back is of poor quality. Has anyone been able to produce decent 8k videop playback in Unreal Engine 4.27?