I have Adobe After Effects CC 15 and have a video where someone is looking at the TV. I'd like to replace what's on the TV with another video and so far I've managed to do that with a mask that tracks beautifully to knock out the screen. The trouble is, I can position/pull the underlying video OK, but the camera moves a little bit and I'm having trouble getting that second video to follow along smoothly. I've played around with the tracker and tried positioning it with keyframes (a lot of frames) but it still doesn't look as good as I know it can. Does this make sense and does anyone have an idea? Thanks!