The first thing I noticed was that you are lucky your horse didn't stop or you would be riding the "invisible horse" over that jump. If you get your heels down your whole position will improve drastically. Concentrate on getting your leg around him, and wait for him to push you out of the saddle from your two point. Also, find a focal point and focus you eyes on that, you can't change what is going on underneath you. You should press your hands into your horse's crest (like you are doing a push up) to help with ducking, and imagine that you have a yard stick taped to your back to keep you back level.
I disagree with equinesalways, you should not fold down, that will incourage ducking, however if you think of the horse rising up to meet you, your hip angle will close.
Hope this helps, and if you get a good quality picture, you can send it in to Geoge Morris at Practical Horseman for the best critique ever, or just read his collumn.