-You do a good job of keeping your chest up and your low back flat, which is impressive for a 1RM.
-In my opinion, however, you're missing about an inch of depth, maybe a touch more.
-You're approach to the bar and your walk-out seem weak. Try standing in front of the bar with both feet next to each other, dip underneath, getting at tight as you can. Take a strong step out with one foot, and then follow with the other. Eventually, you'll know where you feet need to be, take a deep breath, and squat.
-Just like in the squat, you do an outstanding job of getting a good hip-hinge. You really sink your hips into the lift before you fire upwards.
-Unfortunately, you loose that great hip position as soon as you start to pull up. Your chest falls forward, and the rest of your body follows.
-Try to not loose that great tightness you get in your hips. I think of my hamstrings as a spring whenever I start to deadlift, and once I start the pull, I just think "Chest up, chest up, chest up" and "bar back. bar back, bar back." Those queues really help me keep pressure on my mid-foot.
-In general a solid lift.
-You feel tight?
-Get tighter. Shoulder blades back, feet back, get a strong arch, drive your legs into the ground, your upper back into the bench, and drive, drive, drive.
Watch "So You Think You Can Squat" and "So You Think You Can Bench." If you've seen them, watch them again.
Overall, strong lifting man. I hope to see you squatting 405 next year. ^.-