I only watched the second video because, as you know from reading the sticky, we ask that you only post one video at a time.
Squats aren't bad, but your knees are traveling too far forward and you are on your toes a little. Don't let your knees go quite so far forward. Think of keeping the bar and the weight over the middle of the foot. Send your butt back a little more. Get yourself some weightlifting shoes, too.
Is that a Leoko bar?