Installing VLC (w/ GUI) for Quickcam 4000

% sudo apt-get install vlc vlc-plugin-esd mozilla-plugin-vlc

Now run vlc

% vlc

File -> "Open Capture Device" and set "Video device name" to "/dev/video0". Hit "OK" and you should see the video from the webcam appear on screen. If you want the source data bigger go ahead and click "Advanced Options" and increase it to 352w x 288h.