I am trying to replace an image in to a moving iPad screen. The guy is holding the iPad and camera is behind his right arm and shoulder. I know how to replace the image but I can't figure out how to do it because when the guy rotates left, the iPad screen starts disappearing. Can anyone help me how to do it or at least what tools to use to smoothly replace an image to iPad screen while the screen gets out of frame. Thanks.
You'll need to use Rotobrush for those spots where the screen gets blocked. If you haven't used it, read up on it -- it isn't intuitive.