Need help with my squat's form

[PomFect]

Okey, this is my biggest weight I ever lifted
http://www.youtube.com/watch?v=QK3LsH3Tf6E
Yeah, I know, bad form, so some of my friends told me that I didnt open up the chest enough.
On the next training day I had light weight squat, this time i lifted the chest as well:
http://www.youtube.com/watch?v=jtIW1...ayer_embedded#!
but its seems to me I still have good morning problems, my knees shifting forward a bit.
Maybe I didnt push the knees to both sides enough, but I can handle it, but I dont think its enough.

Thanks.

[Brodie Butland]

You're not dropping down, you're dropping down and shifting your weight forward. You can tell by watching the bar path on the first two reps in the second video. Keep your weight back so that the bar moves up and down.

Hard to tell from the angles you provided, but I'm guessing from the first vid that your knees are not shoved out nearly enough. Knees too far in also may explain your obvious lunging in the second video and the depth issues in both videos (but a lot more prevalent in the second).