Narrow your stance. 8-12" between the heels.
Work on keeping your legs straight when bending over to grab the bar. Your knees should not bend much during step 2 (bend over and grab the bar). You'll get better at this over time as you train if you are diligent about it.
More importantly, but also related to the above: don't drop your hips any more than necessary when you set up. You'll notice that on your first rep, your hips shoot up several inches before the bar moves. This happens less on rep 2. Hips shooting up without the bar is an indicator you're dropping them too low during your setup.