A simple hat cam.
www.buymobius.com   |   www.mobius-actioncam.com/
DSCF1683.JPG
DSCF1683.JPG

Showing the camera attached to the underside of the visor.
The silver buttons are heat sinks for the camera. The three buttons control the camera, so it is easiest to control the camera by removing it from your head first. Depending on the mode of the camera you may have to invert the image
since the camera is upside down on the visor.