YouTube now supports 4K HDR playback on Android
(Android Police)

Watch in 2160p... even on 720p displays?! Everyone would prefer if they could always watch videos in the highest possible resolution, but technical limitations often stop us — a slow connection, a low-res display, DRM, paywalled subscriptions, or even a restriction put in place by the app to stop a certain platform`s users from streaming in high res. For instance, Google used to limit YouTube videos to 1440p on Android, even if they were uploaded in 4K or more. Read More YouTube now supports 4K HDR playback on Android was written by the awesome team at Android Police.