The official YouTube app doesn’t let you listen in the background as you work in other apps or browse the net unless you pay for Youtube Red. However, there is a work around that you can use to listen in background without paying for red.
Here’s how you do it.
How to listen Youtube in background with a simple trick
- Download and install firefox on your phone. https://play.google.com/store/apps/details?id=org.mozilla.firefox&hl=en
- Open youtube and play your videos and now open an another app and voila your video will continue to play.