Here's a short article from Michael Reichmann's Luminous Landscape web pages that describes some of the ways a DSLR with video capabilities differs from a true video camera.
http://www.luminous-landscape.com/reviews/camcorders/cam-cam.shtml
Don't think video captured on a digital camera designed for stills is of poor quality. It's just different than the product of a true video camera. And a video camera produces a different look than a film movie camera does. It's all aesthetics and preconceived notions of what a "movie" should look like.
Chip Haven
http://www.luminous-landscape.com/reviews/camcorders/cam-cam.shtml
Don't think video captured on a digital camera designed for stills is of poor quality. It's just different than the product of a true video camera. And a video camera produces a different look than a film movie camera does. It's all aesthetics and preconceived notions of what a "movie" should look like.
Chip Haven