You have pretty long legs, so no matter what, you're going to have a bit more trouble than the average fellow. That being said, there are a few things I would suggest to improve the first pull:
1. Keep stretching so you can set and keep a better arch in your back right from the start and through the entire pull.
2. Engage the lats a bit better to both help extend the back and push the bar back in toward your lap.
3. Push the bar back sooner - right as it passes the knees. You're allowing a bit too much space prior to the bar's contact at the hips.
4. Squeeze the shoulder blades back and a bit up and really use the lats to push the bar back and up as you start your second pull - that will help you get the bar up into your hips better without having to bend your arms as you currently do to get that position.