I'll begin with a disclaimer that I'm just a big dummy and not at all a coach. But I took a look and decided to see if I could spot anything for my own learning purposes. It looks like at the start you end up with your shins too close because when you look down to check they back off a little, and once you return to straight stance the shins are almost right up against the bar. Other than that I didn't see anything. Shirt got all nice and wrinkly in the back indicating the back was set properly.