Can I play the highest quality video on Apple TV? Will YouTube play 60 FPS video on the Apple TV 4K?
Yes, the Apple TV 4K (2nd generation) released in 2021 supports full 60 frames per second 4K resolution YouTube video.
Owners of the Apple TV 4K (1st generation) may notice that 4K 60 FPS video played in the YouTube app only displays at 30 frames per second. These limitations have been overcome in the updated device.