Squats are what people call high bar or olympic squats. They look good for what you are doing, but they aren't the best way to squat to move more weight.
To learn low bar:
1) Sit on the edge of a chair with your legs coming off such that you're knees are a bit in front of your toes. Maybe 1 to 2 inches.
2) Feet should be about shoulder width with toes pointed slightly out (you're good on this)
3) Hinge forward at the waist until your belly is touching your upper legs.
4) Lift your chest up and try to arch your lower back.
5) Drive your butt straight up in the air. Shoulders should rise at the same rate.
Your back will not be vertical, as it has to come forward a bit to keep the barbell over your feet, as your butt goes back. Don't get tricked into thinking your should push your butt back indefinetely as at some point you will have to sink down to load up the ass, high hamstrings, and adductors.
Post a new vid after you try it.
To embed youtube, just post the link, example: http:// www.youtube.com/watch?v= ###########
My knees are going forward as I come out the bottom. In starting strength rippetoe
says that wastes power and energy by letting the hams lose tension. Probably means I need to stay on my heels more and use my glutes more at the top instead of using the quads to lock out. Easier said then done. I tried to put the bar even lower on my back but my wrist and shoulder flexibility is not that great yet.