You are viewing images from a Sony EyeToy which is a videogame camera for the Playstation 2. The live image updates anytime there is motion in front of the camera. If there is no motion, you will see the last four motion images snapped.
This is all made possible from the instructions that shows you to how to use your EyeToy on your PC. If you need help, please check out the Eyetoy Help Forum for assistance from other Eyetoy users.