How to lock youtube screen while playing

- How to lock screen while playing youtube video
- How to lock screen while playing youtube on iphone
- How to lock phone screen while playing youtube
- How to lock laptop screen while playing youtube
- How to lock your screen while playing youtube
- How to lock macbook screen while playing video on youtube
- How to lock screen while watching youtube
- How to play youtube in lock screen
- Youtube when screen is off
- Youtube app play when screen off