Play video sound with screen off is a part of the MIUI Video Toolbox. This handy toolbox supports carries for some apps and tools that you can access while watching videos. For example, Screen Off, Record, Screen Cast, etc., which you can access while watching YouTube videos on Xiaomi smartphones.

How to Play YouTube in Background on Xiaomi Smartphone

That’s it. You may need to wipe the cache of the YouTube app before using it for playing in the background. FYI, usually, you won’t be able to listen to YouTube music in the background on Android smartphones without an app like YouTube Vanced. But there is a workaround to make it work. Also, a custom version of Android, for example, MIUI 12 and MIUI 11, has a hidden feature to play YouTube music in the background while the screen is off.

More Resource:

How to view Lyrics on YouTube Music app for AndroidHow to turn on Sleep Timer in your favorite Music Player on Android PhoneSet Spotify/YouTube Music songs as music Alarm on any Android phoneHow to play free YouTube Music in background while screen is off