3:42 seconds of squatting is more than I ever want to deal with ever again. Just post your last set in the future. That is typically where most of the flaws are apparent anyway.
Overall, nice job. Decent hip drive though would be improved if you can keep those knees from sliding forward at the bottom as you have already pointed out.
Shove those knees out hard. If they are shoved out hard enough they cannot slide forward. I think if I were standing there I would tell you that your first movement with your knees should "feel" out and not forward, if that makes sense. When you break the hips and knees, send the knees out.