By HIGHLIGHTS 4K playback on a low-end smartphone could lead to a lacklustre performance. On devices that can playback the content, you will see a supersampled image on a display with a resolution lower than 4K. The option is great for those that want a crisper image when consuming YouTube content. Play content in 4K on YouTube for Android even if your device doesn't have a 4K display. Even if you don't have a 4K display on your Android smartphone, you now have the option to consume YouTube content in 4K on Android. Reports of the same started coming in from February 15 where people with a 1080p or even 720p display had the option to play videos in 4K on the YouTube app. This feature has been available on iOS for some time now.