It may be my camera, I don't know, but I couldn't manage to get anything clear. It got too bright for my camera and there was a weird pulsing effect.
Viewing post in Webcam Feedback Fractals comments
The pulsing effect is because the screen becomes brighter, so your camera adjusts and so displays darker. Then the screen becomes darker, so the camera adjusts and displays brighter, which ends up in a loop.
I haven't been able to figure out how to do it with my camera but I suggest that if you can, you switch it to manual to prevent that from happening.