David,
These are not terrible. I would try focusing on staying tighter in the hole as it looks like you relax a bit and let your knees slide forward on several of the reps. Also, on the reps where you are having the most difficulty maintaining a vertical bar path you are driving your hips backwards out of the hole instead of straight up. Try thinking about "the master cue" from the 3rd edition. This may be able to clean up both of your problems at once.
Hope this helps,
JP