how to make video only when tab is active

Hi,
I want to make this: video on website which plays only when the tab is active and counter which checks the mouse movements and if 30 sec there's no mouse movement the video stops.
Basically, I want to force users to watch this video.
tnx

Use jQuery - track mouse movement and then remove the video from the DOM if it 's not moving.

Yes, this would be pretty easy to do with Jquery or plain Javascript.