Stop notifications while watching video

[jackeen]

While streaming video over wifi/data, how do I stop ALL notifications, popups, phone calls from interrupting the screen?
Android ver 5.1.1

 

[Gurkanwal_chauhan]

I think there might be an option for that in your notification settings. Though i never used a lollipop device but i saw that setting in kk,mm and nougat. We can set that in what apps the heads up notification must be shown.