There are quite a few things to address here. Have you read the Blue Book? First, you should really invest in some lifting shoes. Second, Squats should be filmed from a rear 45 degree angle at hip height. But even from this view I can tell there is an extreme amount of knee slide occurring, so much that your heels are coming up. Sit back, knees out, stay midfoot. The deadlift is also being pulled almost from your toes. Bar needs to be over midfoot for the entire set.