gold’s; thanks for taking the time. i enjoy watching powerlifting videos myself. 
the movement of the rear to the back as i begin ascending is something that just happened. it just was the way it was done when i squatted, actually i did not become aware of it before i saw it on video. and it was just totally odd. did not make much sense. wasted energy i tought. what i try do do to correct it is to push hard against the bar, and start the ascent with my head first, and push HARD against the bar.
i have read a lot of articles from this site on technique, and it helps a lot.
in the second video the stance is wider, and the toes are turned
out.
in the first video i tried to stand a bit closer than usual actually to try to get enough depth. usually i have squatted in a wide stance fashion with toes pointed right ahead. but it is very difficult to get enough depth using that style, so i have changed it to a wide stance, but not super wide, and toes pointing out.
thanks for commenting on my squats, greatly appreciated. good luck with your training as well!
DPH, thanks for the comment as well. 
buffalokilla, thanks for the comments on stretching. actually i have performed less stretching on this smolov routine i have just completed… so i have gotten a bit more stiff, but this i will fix again.
thanks again for the comment!
T-mag is a great site!
love it!
stay strong!