They look good to me. Your legs get in the way a bit when attached to the seatpost and the dog video is a bit shaky

but those are the only issues.
I have a cheap HD keychain camera that I tried out on my bike once. I used a helmet mount, a handlebar mount, a rear facing seatpost mount and a front fork mount. The video is boring because I was just cruising around my area but you get an idea of what the different positions would look like. My favorite one is the fork mount. The video quality looks much better on my computer. If anybody knows why the quality was murdered by youtube I'd appreciate it because the uploaded version sucks
I was thinking of getting myself a Contour HD for next years racing season. I like the features of the cameras and they have a barebones version coming out this month for just over $200. Plus you don't look like a teletubby when it's mounted to a helmet.