<. YouTube does not support background playback. For instance, if you exit you YouTube app or lock your smartphone, the video will stop as well.Play YouTube Videos in Background. 1 Torch Music. A nice little app that does what it claims. Well, kind of. Want to lie in bed and listen to a YouTube radio or music with your iPhone or Android smartphone locked? Wanner switch to another app like Mail or Messages with keeping YouTube video/music playing in background? Background music for your videos plays a major role in enhancing the viewers ability to continue watching it. A good background track will convey appropriate emotion, mood and add instances of humor. But have you ever wondered how any user edits the video by adding good background music for YouTube. YouTube has its own video editor through which you can add background music to your videos and customize them in multiple ways. It seems looping background videos are the new thing.