Stop motion can be another cheap option. Though, it can take a considerable amount of time. I created a video for the launch of this product with no prior experience making professional videos. I used my wife's DLSR camera (if I didn't have one I could have cheaply rented one) and about $50 worth of props from Amazon. This was the result: http://www.youtube.com/watch?v=kRdL55iSN-Y
Looks good! Only criticism is that you should keep it all manual to create a consistent look between each frame (manually set ISO, shutter speed and aperture).
