These are velcro mounts for the GoPro Hero video camera. They were designed to easily attach to RC plane fuselages and wings. I have since used them to attach the camera to my leg and helmet. They work remarkably well.
I used these mounts to film this video of my RC glider: http://www.youtube.com/watch?v=3jVroP8jzSQ
Update: After numerous flights, and other unplanned uses, the mounts are holding up well.
Slope Combat: http://www.youtube.com/watch?v=hyWu5y56QWc
Print solid. Clean out overhangs. (I've had the best luck printing it out flat, and it has been plenty strong).
Use less than 20mm wide velcro(double sided) strip (I got mine from Micheal's arts and crafts store) to attach to RC plane, leg, helmet, etc...
If the surface is easily damageable (like a plane's wing), add some soft foam to the backside of the mount.
Don't forget to add a safety line to your camera...just in case the camera comes UN-attatched somehow.