I use the VIO POV 1 ........ high dollar but is an amazing camera. Review screen, waterproof, remote control, "Tag" feature, etc.
.... HERE .... The "TAG" feature lets you run the camera continously and then hit the "tag" button to record a clip of what you want.
I also have the "Ultra Clamp" which allows you to place the camera just about anywhere on the bike.If interested, I'm selling mine - which includes two lens and other options. Nothing wrong with it. I've used if for a couple of years. Just simplifying my life. Video filming, Nikon D90 for still pictures, J&M Integrator for music, CB, Intercom, iPod for tunes, GPS, XM Radio ..... It's hard to remember that what you really want to do is ride a motorcycle!!!

