fixed
Honestly, the form looks much better than I expected for a third squat session. I'm not a depth nazi, but you may be a tad high on a couple reps. Try angling your feet a tad bit more and pushing your knees out so you have a pocket to sit back in. It really doesn't look bad to me though. Weight is obviously really light by the speed of your reps.
Sit back more. You're breaking too much with your knees. Break with your hips.