^ listen to every word.
The part about forcing your knees out really helped me a lot. Squat went from 315, bad depth, to 500 at regulation depth. I also noticed what helped me was working on ankle flexibility, and working on abdominal strength. Stability helps a lot.
X4 on the EliteFTS videos, extremely helpful. Take notes and write down a step-by-step guide. Practice with light weights first to get form down.