Looks like you have a tendency to pitch forward, especially on the third and fifth reps there. I've struggled with that myself. One thing that can help is to think about keeping really tight shoulders up where the bar is resting - squeeze back against the bar and that can help keep the chest up instead of letting it drop.
Do you have flexibility issues at all? It seemed like you were descending cautiously and just barely hitting depth - I've found that hamstring stretching and the squat stretch helped me get a more powerful bounce at the bottom. I'm no trainer, so take this all for whatever it's worth and if it doesn't help you forget it. But I bet you'll find squatting a lot more enjoyable when you can keep the bar over the mid-foot and get a real bounce out of the hole.