You might be using a app to play youtube video or music in phone background; but today I will shows easiest way to play youtube video in android phone background without using any app; not only this you can use full desktop version and features of youtube in android phone. Let see how to do this;
1. Open chrome browser type youtube in address and open it
2. Tap on three dots check on “Request desktop site” now you can use youtube as desktop site
3. If you minimize chrome, the video and music will still play in phone background