Congratulations on your recovery. On the whole, it looks like you're progressing very well. Your depth is good, and bar path is vertical. Make sure you're looking down as you squat--maybe look at that rack foundation instead of straight ahead. Also, try to work your hands in a little more to tighten your upper back.
Also, take a look at your left foot in the video. It looks like your instep comes up in a few reps--are you having any left knee pain? Work on keeping your feet evenly planted; a good pair of lifting shoes would also alleviate this problem.
Great form, speed, and progression. Just a couple of items to look at.