Hello.
I have a footage of a person inside the car, driving.
[b]I need to replace the background in the window, and put a moving background there, so it looks like a car is moving. 
I know how to mask out the window, but i dont know how to put the moving background inside this mask.
When i put the background on the top layer, it applies to the area around the mask, :sad: but i need it to be inside it.
[/b]
Could you help please.
Thanks