I just noticed, as Terry says, you're collapsing ever so slightly just before you loose. Keep the back tension coming right through the draw-loose-follow through cycle. Again, your bow hand, but that's been talked about. One thing you might want to try is to place just the tips of your index & middle fingers on the back of the handle, relaxing your thumb, ring & pinkie fingers. Don't apply any pressure with the 2 fingers in contact with the bow, but it gives you a little mental security against dropping the bow. It takes a bit of getting used to, but by closing upthese 2 fingers, you relax every muscle & tendon in your hand & wrist, meaning that you're not 'heeling' or torquing the bow on release.
It could be the angle you're shooting at, but your left shoulder looks a little hunched too.