Vuforia: How to play video on another screen till the end after target is detected?

Hello! I need your help with my project, maybe with some helpful tutorials that you know. I have t$$anonymous$$s project for android app where my painting is an image trigger, when phone detects it it should play video(with audio) but not on the portret. I should go to a fullscreen mode, play video till the end and then came back to previous screen. And it is important that after your phone detected image target and video starts playing it still plays even when you remove your phone from image target. Maybe someone knows is it hard, maybe you can send me some tutorials and i will figure it out, but yeah. Sorry for my english, if somet$$anonymous$$ng seems confusing i will try my best to explain it easier.