I got Mr. Matt Reynolds to type a reply, but his iPhone and the site weren't cooperating, so I am pasting his response below:
Les,
That's a damn good squat man. Was that in St. Louis? I recognize alot of the guys in the video- and it sort of looks like the old Eagle Gym in St. Louis. Anyway...
I think that your biggest problem is the lack of shoulder flexibility, which makes it very very difficult to "squeeze your chest up." One thing that I tell my guys right before they start their squat descent is "chest up!!" - You do a pretty good job of this, however on the video. But when you start coming back up, your thoracic is unable to hold extension, and the energy leak there causes the hips to come up, the back angle to change slightly, and the weight to move just in front of midfoot a tad. The easiest cue to fix this is "squeeze the chest up!" ...but again, this is nearly impossible to do with your hands out on the collars. I know you're never going to get your hands up next to your shoulders, but even getting it securely on the bar would be of much help I would think.
Btw, I'm typing this on my iPhone, so sorry for the typos.
Matt