I don't know if this will work because I don't have a video camera, but what I think this should do, is take the camera feed, which should be your face, and turn it into a rock. Tell me if it works or not, and try to help me fix it, because I don't have a camera to test it. To start, there is no filter, so you just see your face in a rock shaped screen, but if you press space, you'll switch between 12 different filters, including off
Credit to --The--Creator-- and ChristianKid5