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masking a video on top of another
I have to create video clip involving a video on top of another video. Here is my problem, I brought both into After Effect and added a mask to the one video that would be inserted. With the mask, I was able to edit the mask’s shape with the main video. As I moved forward, I added a keynote for positioning. I did this repeatly editing the mask as I went along the track. When I played it back the mask did not worked properly. What effect should I use or can create to look as the main movies moves, the smaller one moves with it. I am using 6.5. Please let me know if this is to vague and I will try to clarify my question