Back is coming out of extension a little bit on these. Try harder. Don't raise your neck: keep your gaze directed towards a point on the floor labour...
From what I can see this looks fine, other than being perhaps a bit too deep. What is the connection between your initial problem and this squat? Can...
I would be very surprised if you could make twice weekly increases on your squat for all that much longer while your deadlift slows down. If you like...