Your hips are a out of line on your toeside turns - notice how you have a straight front leg and bent back leg? This normally puts people in the back seat a little bit, which makes controlling your speed on your toes on steeps difficult.
I would work on that for now, then on some flexion and extension. Your lower body is pretty static, apart from you pushing your back leg out on those toe turns of course because your not steering the board with your front foot.
Not bad tho.