I’ve modified a cheap smart phone into a combination GPS mapping system plus video camera that can be mounted on any sort of tube, such as bike handlebars. The design is derivative of my Mason Jar tripod from a couple years ago.
My original design only used 3 headbands – the 1 purple headband and 2 brown headbands pictured. Once I took the device on the road however, the plastic clip came through very loud on the microphone while filming. You’ll find the video footage of the creation process below. Jump to 4:50 to see how loud the setup is without the extra rubber bands holding it in.