Ok here goes. If you taught yourself to jump you shouldn't be. You cans eriously hurt your horse or you bombing around fences like that. Get a coach!!!!!
As for your position... toes in, you are completly throwing yourself on your horses neck, sit back and let your horse jump up to you. Because you are so ahead I can't critic anything else becasue everything is in the wrong place..
I'm trying to sound mean but what I am getting from you is that your horse sucks at flatwork or is to hard so you tossed him over some fences then thought he was good at it and made them hoigher and higher... STOP jumping is very serious and you have to do it right!