Mounting a video camera to a bicycle is nothing new. Plenty of people have recorded their two-wheeled conquests this way. A device called the Rideye even went so far as to act like a "black box" recorder for bikes in case of accidents.
The Fly6 combo taillight and HD video camera on Kickstarter figures that the greatest threats are most likely to sneak up on you from behind in the form of motorists behaving badly. The idea is to capture them on video should an incident occur.
For a pledge of about $122, you get a Fly6 capable of 720p HD recording. It runs on a rechargeable battery with up to 5 hours of life. The video recording loops automatically, so you can save the footage if need be. The taillight itself features LED strobe lights. When the lights are on, the camera is recording. Fly6 boasts a nano-coating to repel water, as illustrated in a demo that shows the taillight submerged in a fish bowl and still working.
The creators of Fly6 have a grand vision in which bicyclists everywhere use the devices and drivers everywhere, knowing they may be under surveillance, drive more carefully around bikers. That's a nice thought, but probably not something that will become reality anytime soon.
That means the Fly6 is really more about having a video record should you be involved in an accident or need to prove when a driver has been harassing you on your ride. Yet, it also can be a fun way to record your ride or other bicyclists riding behind you.
The Fly6 site has a section dedicated to demo videos with titles like "No space given," "Near miss," and "Close call" that show how much riders have to deal with on a regular basis. If one of those close calls had been an actual accident, the footage could come in handy.