Video and Drivers

Hello guys,

Please tell me, how I can link video-layer (mov or mp4) with scroll object via driver?

For example I scroll page down and my video-background start animates, when I scroll back the video is animate to back, rewind.
Scroll + video time.

I can’t information in UI how it works. With static layers it’s work easy, for example I draw box and triangle start to rotate by the driver.