Holy crap! That is awesome!
Great gym too.....
How much weight is that? You made it look easy and smooth. I don't know anything about form, but it looked like nice and deep and under control and even pace and I know you've studied form and technique so it looks really impressive.
120kg, I am not really a strong squatter.
Any tips for me based on pics or based on knowing that I'm new to the squatting game? I'll get a video soon too. That may tell a better story.
Like has been said allready, a better pair of shoes might actually be a good investment. If not a pair of lifting shoes then a pair of converse style shoes are probably better than the ones you are using now. They look like running shoes, running shoes are too soft and kill your stability.
If your back rounds as you go deep it could be a flexibility issue, but could also be technique related. Or both. Might be worth trying around a bit with different stances etc. Otherwise I believe best way to work on flexibility is to squat with light weight, with good form. Front squats and overhead squats might also help.
If you like reading books it might be worth picking up a copy of starting strength, it has the best introductions to squatting I've seen in writing.