Your squat video is the only one that would play for me. You need more hip drive. To get it, lean your torso over immediately as you start your descent, so that you can set your back angle sooner in the rep. Then, coming out of the bottom, drive your hips straight up towards the ceiling. Also, while you seem to be making an effort at getting a good big breath before each rep, I just see your mouth moving; I don't see your belly moving. Get a good belly breath,use your diaphragm to breath. This will help you brace your abs/torso musculature better than you currently are.
Please read the stickies on form checks, as this is a less than ideal angle for us to provide you with quality feedback. Also, please edit your videos, we don't need to watch 40 seconds of you standing at the bar before unracking. Thanks.
Edit: Also, the bar is too low on your back. Search this site for an article/video on proper bar placement.