Here is a 200-second promotional video from Canon for the 5D Mark II that essentially showcases the various Canon lenses that can be used to produce such a video. The ad's soundtrack is annoying, but what is most annoying is that I have yet to be able to produce a half decent video with mine.
Video-making is not as easy as one would think, especially when engrossed in making still photographs, then switching to video mode as an afterthought, or just to record a few moments of video. It takes a different mindset, focus, training and resolve...and a tripod would be useful.