rhbuilds, adrenalin camera. makes helmet cameras with stock mounts. kits have a dvr that holds all the video! works great! only thing theres a cord from your crossbow to your pocket, sound pickup too! it also works great for checking shot placement while waiting. if you use a lighted nock the video is amazing! on my bow its mounted right below my limbs looking forward! check them out!
Don't get one of those Epic cams. I tried that, it was terrible. Very well made, the the video was really poor. Took it back and bought a helmet cam from ebay. Of course soon after I bought it my son drops our camera in the creek. So I need to replace the camera before I can actually use it. But it should mount on top of my scope.