I have two videos of the same dimensions that that will play as one video. So, the starting point is two videos loaded as two layers with the same start and end point. Then I want to cut out a transparent rectangle in Layer 1 that I can see the corresponding area of Layer 2 playing through. I also want to cut out a transparent rectangle in Layer 2 that I can see the corresponding area of Layer 1 playing through. The two rectangles are in different parts of the screen and do not overlap. Also, the videos in the rectangles will appear exactly as they are in the other Layer. So, no video resizing or other adjustment is required.

Apart from the two rectangular areas, only the Layer 1 video will be visible in the playback.

I would be grateful for any suggestions.