Depth is right at parallel except for the last rep that one is about an inch or two high. You could stand to go down a little slower. I think it's the extra speed that is causing you to close down your knee angle and "catch" the weight. Your first rep looked pretty solid but as you got faster the forward knee travel got more pronounced. Your first rep was also your're smoothest because you actually had your hams engaged for more of the lift and there wasn't as dramatic a transition betweens hams and quads at the top.