OK just got done watching the last half of that video (skipped the early anatomy lesson... know that stuff ). So I really liked it! And I totally agree with his stock answer to almost all fitness questions "It depends".
Found the info on knee tracking with narrow vs wider and the stuff about knees going past toes vs staying back really informative. I may give some of those ideas a shot and try squatting again. Might "allow" my knees to track just a bit more forward than my super strict restrictions on that from before. According to his info there this would increase stressors on the knee, but reduce it on the low back....might be great for my issues.