The go pro is a solid cam have had mine for a season and use it non stop. The mounts do break easily but much less damage to the camera and your helmet this way. If you look at that video and compare the footage the go pro gives you a nice wide range of a view and allows you to see far more then all the others. The standard go pro by no means has bad quality video, hooked it up to my 52" big screen and the resolution was still there to look fine not up to par with HD but what do you expect? Best bang for the buck with excelent performance go for the go pro you will not be dissapointed.
Hey man, I was in the same predicament as you, I couldn't decide whether or not I should go with the GoPro or the Contour HD
in the end I bought the GoPro, great camera, takes pretty awesome pictures, the Video quality is pretty damn good, its very durable, like the other guy said the mounts do break easy but it reduces damage to the camera itself and your helmet, its also 100% waterproof which is very handy if you do water sports. In the experience ive had with it, ive had a few major crashes with it, and its 100% fine after every single one, plus with the price cheaper you can buy more mounts for it while it already comes with quite a few depending on the package you get. the contour HD however comes with the gogglestrap mount (which i admit is pretty awesome) and then the others you have to buy yourself...
I recommend the Gopro man, I was worried i wouldn't be happy with it, but I love it.