With tvOS 14 Apple finally opted to support Google’s own VP9 codec for UHD 4K content, as well as on iOS too. tvOS launched a few weeks ago and starting late last week, the official YouTube app on Apple TV was updated to support 4K videos.
Previously the max was 1080p on the Apple TV and now users will have access to 1440p and 2160p (4K) videos on YouTube. tvOS 14 only runs on the Apple TV HD (4th gen) and the Apple TV 4K (5th gen)
