I have to tell you that the ShotKam is a whole lot clearer that your video/flim. Plus, you can slow it down and see exactly what happening.In order to capture movies like you see on DVDs with Eye Cam, semi-transparent mirror (beam splitter) should be used, so camera will 'see' exactly the same picture as your eye.
Any other glasses with camera will not inline camera with your eye.
Some time ago I was interested with 'Eye Cam' solution and build my own using Looxcie HD camera and beam splitter mounted on top of shooting glasses.
Here is a link to the video I captured using my solution (not a perfect alignment, but it possible to spend some time and make it perfect) :
Hope this will help.
It may be not recoil, but me. Camera was mounted on top of the shooting glasses, so I probably moved head away from the gun after the shot.Until I saw that video, I never had any idea there was that much recoil on a trap gun. I used to see that shooting sitting rapid fire with a 30 caliber rifle, but in my ability to stay on the gun, I always though shotguns stayed in position more than that.