This is the vid I saw some time back. After watching it, I thought that the "fixed" squat motion was far more "good morninged" than the first squats. Right at the end there are some side on views of some squats and it looks kinda retarded. In practice it seems that the hips pop up before the head and bar begin to move up.
The "looking down" thing is all wrong. You should not be looking down, you should be looking wherever dafuq you need to so as to maintain a neutral spine. That would be generally looking downwards, not upwards, but definitely not looking down at the floor in front of your feet.
I also notice that he says to "keep your elbows up". The lower the elbows the more drive you have into the bar. High elbows and looking down is a recipe for getting nailed by the bar, and not in a good way.
Bottom line: keep your spine in a neutral position, locked tight. Video your form to see what works best for your body dimensions.