I watched only the first two videos in the latest post. Here's what I think -
The first half of the descent is good - you're sitting back & really keeping it under control, but then as you get near to parallel, your knees travel forward & you lose tension in the hamstrings. Also you lack hip drive. Getting up from the hole should be a hip movement & the upper body just needs to be very tight pushing into the bar. Shove your knees actively out throughout to keep them from coming forward, and keep sitting back till you hit the depth - work on the hamstring flexibility if you feel they are tight.


