Great Job- Couple of comments,
First, i really noticed alot of the animation style transitions. some parts were clearly from the old video (understandable) but some parts (like the factory) look like they could have used more of a detailed pick to them, like some of the later scenes that looked GLORIOUS.
Second, dont stop what your doing! Great job, and the song is fantastac anyway so you had alot of elbow room to work with. i REALLY liked the little "human in a robot suit" adition, it added to the comedic feel. Keep it up!