I like to say "I am not a form nazi", but come on! If you are putting out instructional videos, be able to demonstrate correct form. A free YouTube video, like the one above, is one thing, but if you're charging a chunk of change for a DVD, do it right, take 2 and get your form down before shooting, or get someone else (one of your bazillion clients) to do it for you. [/rant]
If you can look past the cleavage and bad (good?) camera angles, you'll notice
the rounding lumbar, the heels coming off the ground, and dumbbell forward
of the body's center of gravity.