I am way to obsessed about getting in that next gnarly pow line and dont want to fiddle with a camera. Besides, no matter how great the camera, watching it is noting at all like being there in person. Now I do think video is great for doing movement analysis when coaching but I am filming the rider so they can visually see what I am seeing when we do MA at the end of the session.
Yeah I think the best footage I got with my contour (other than when I took it snorkelling) was when I trailed my GF to get a video of her progression:
Main thing is the video's look nothing like what it's really like. And that's mostly due to the wide angle lens. I'm looking at getting a chest strap for my DSLR so that I can take good photos and vids on the hill from a stationary position. I'll miss the "chase cam" style vids from the helmet cam, but the DSLR will take WAYYYYYYY better photos and vid.