First off, congrats on a great debut.
Your squat set up looks a lot better. I still think you could shave off 2 steps from your walkout, although given the width of your stance, that rack set-up may have interfered with your feet.
You may want to consider moving your feet a little further apart for your unrack, so you have less distance to cover to get them in your squat stance.
Agree totally with bodyguard about your benches. It would appear you are using a Fury. If you watch your second attempt closely, you lose the groove of the shirt towards your head about half way up. In your case, I do think this has a lot to do with elbow position.
You do a good job of maintaining backwards momentum on your pulls, obviously, but I do think you are wasting tons of energy rolling the bar that distance.
Additionally, if you watch closely, it is basically impossible for you to set and keep your arch using that method, and you end up having to fix that at the top, which is, IMHO, a big part of why you are straining just above your knees.
If you fix your starting position you should have an easier time at lockout.
Bottom line, great first meet. Congrats.