The bar looks like it's resting a bit high. When you drop, don't lean forward it looks like your heels want to come up and you push forward with the knees. When I say don't lean forward, I'm not talking about bending over forward, I'm talking about creating a moment arm and pushing onto your toes. Hopefully that makes sense?
There are other minor problems, but I think in fixing the first two maybe the others will fix themselves?
Obviously generic advice such as stay tighter, more controlled, etc also apply.