I love this. I have a small digital camera that can take motion pictures, up to 6 or 7 minutes worth, and a while back I was taking it to the gym to record some of my lifts. I wish I had the camera with me now, because I am stronger and I think my form has greatly improved in the last eight monts or so since I last recorded.
I don't know what your bench is, but we are similar in our lifting poundages. I actually pull conventional, though.
A few things I noticed in your clips: Does your gym not have a power rack? I used to use that kind of "squat rack" but I had to stop. For one, I am too short to squat deep enough where I can still actually have the rack spot me. Second, I got tired of taking 5 steps backward to set up. I now use a power rack and I have a 3 step set up. Plus I can actually use the safety pins to spot me and go below parallel. This is important since I work out alone.
Also, and this is just an annoying pet peeve of mine, but I really hate those easy grip plates with the squared off edges. They just irritate me. Make them round!
As far as your form, it really looks ok to me. I think form is somewhat individualized and depends a lot on body type, size and structure. Thus taller people tend to lean forward mord in a squat. Shorter people will have their hips lower in a deadlift.
As long as you are making gains and your form isn't completely off base or dangerous, I think you're ok. I just think that the longer you lift and the more your gains start to slow, the more you have to tweak your form to find what will work for you and continue to help you lift more, but lift more safely.
Good luck. I will see if i can dig up some old clips to post on here.