Things i did notice:
1. Starting WAY too high. Get your ass down and back. And pull your shoulder blades together.
2. Your shoulders should be even with the bar (from a side angle...i usually peek in the mirror before my set to make sure that i am even or behind the bar.)
I disagree with powerbuilder, you are NOT in your optical possition to pull. Yes maybe your back is strong as hell, so it is compensating. But when the weight gets heavy, your not gonna be able to pull it up with all your back. The deadlift works the legs, get them involved more. Drive your heels through the floor during the pull.
I powerlift, and my main goal before a lift is to shorten the bar traveling distance to make it easier for me to lift. So even though im making the traveling distance shorter, i still make sure my ass is down to drive out of the hole. If you start 'kicking up' your hips and your ass, when the weight gets heavy your not going to be able to finish the lift.
Also, Please get a 3 rep max lift, or a 1 rep max single. So we can see your form break down too. (not putting u down, as when we can see your form go to complete shit at a weight, we can pinpoint weakspots.)