I was shooting some footage for a short film and in this film there's a shot of a TV and a news broadcast is on. Naturally, I found that shooting the screen straight looks bad so I decided to use a green screen. However I cannot seem to find a way to make the images on the TV screen move with the camera and foreground. It stays static and the rest of the shot moves because I'm filming on a handheld camera. So how do I ensure they move together?