I've been lifting consistently with free weights for the past couple of years, but I've always lifted alone in my basement and garage, and I have a hard time telling if my form is right. I feel that my form could be holding me back. At 160, my current maxes are:
Squat- 265
Deadlift - 335
Shoulder Press-140
Chins- bodyweight + 80

Squatting: http://youtu.be/-P4DYYfyxmc

Shoulder Press: http://youtu.be/WHsTJbvCz7g

Deadlift: http://youtu.be/ae7XscbXz50

Chins +45: http://youtu.be/cn3hr2Ha5j0

I apologize for the poor lighting in the videos

Thanks in advance for the help