How to play music from youtube on iphone and use other apps?

I double click home and go to other app but the video shuts off

You can't. Sorry but that's how the software is.

Thats what's bad about apple they make their products simple and easy to use but lack on other basic functions. Sorry but Iphones don't support multiple app uses at the moment maybe in the future though. I do know that Android supports this function!

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