I agree with everyone else. Everything about the video just seemed awkward. Your position isn't secure but you won't put your stirrups up. Your position on the flat needs work, and that then transcends into your jumping position. You either get left behind, slam onto his back hard and yank him in the mouth, or you get ahead of the movement and stay forwards for too long.
Going back to smaller jumps won't make you any less of a rider. It is essential to have a good foundation, and in my opinion, only when you have perfection at small heights should you attempt bigger.
Sorry if I sound cranky, I'm tired