We have: NVIDIA GeForce 7600 GT, ForceWare 83.90 Winxp A monitor and a projector are connected to the video card, the video area from the player is output to the projector.
If you right-click on a video file on the computer (avi, mpg is not important) or select the file and press Ctrl + C, then this causes the image to twitch on the projector.