Restart the YouTube app or reboot your device If the YouTube app or your mobile device has been running for some time, there may not be enough resources for background play to work smoothly. Try closing the YouTube app or rebooting your phone.
Is there a way to play YouTube in the background on iPhone?
Here's good news for iOS users who want to multitask on their phones while streaming a YouTube video in the background. After being the much-awaited feature among Apple users, the option to choose between picture-in-picture or background play for YouTube is now available.