The new Apple TV supports h.265 but will it support the vp9 codec Youtube uses to stream 4k video? Youtube previously allowed users to upload 4k in h.264 but back in January limited it to the vp9 codec only. Since then Safari has been unable to play 4k content from Youtube meaning users have had to use Chrome to access it. Will Youtube be able to update their app to take advantage of 4k? If they don't will this affect anyone who was considering buying the new Apple tv? Youtube has one of the largest libraries of 4k content in the world and not being able to access on the new box would be a pretty major drawback.