Squat looks pretty damn good. Seems like your heart rate is pretty high, and if you can't hold your breath, you can't really brace. Looks like you use the rebound a little, which is great, but if you don't time it right or you lose your air, it's tough to recover. Personally, I think you might move your feet a touch wider to widen your base of support, but that may affect your bounce. When I'm having a shitty session, sometimes I'll take some weight off the bar and just eat some pause squats as punishment. Keep trying new things until you're happy with your setup.