great squats.
But he could have his back more straight I agree. People always have excuses not to squat. Uuuuuuh it's unnecessary, too much stress on the back blablabla.
Try with proper squat shoes, and drive with your head up instead of down or straight. Head up. Also putting a piece of board under your ankles helps to keep your back more in line, if you sit down instead of "going down".
Twink giving advice, but I'm right.