We recently learned that Apple TV can play 60fps YouTube videos. (SEE HERE) Now you can finally play 60fps YouTube videos on your iPhone! At least on the iPhone 6... I can't confirm any other models. When a 60fps video is playing, click the icon in the far upper right hand corner. Then select quality, and then 720p60 or 1080p60. NOTE: If you want to Airplay a 60fps video from your iPhone to Apple TV, you must select 720p60. The Apple TV can't handle 1080p60 video. But it will play 720p60 perfectly.