Agree, a side angle might be really helpful. Also, it seems like you're standing up in two stages. Your hips start to rise, but your chest stays kind of low then you straighten up at the end. It should be a more fluid, connected movement. It also makes me wonder if you chest is dropping too low (again hard to see from this angle).

I agree with your knees....looks like you might just want to tweak your stance a bit maybe. Otherwise honestly I thought it looked pretty decent. You do tend to bend a bit on the way up but I think it's because you are leading with your hips, which is what should be happening but with that being said, if the bar is still in line with the halfway mark on your feet, you are good. Side angle video would help with that!

I think you look great....looks like the bar stays solid over the middle of the feet. Looks like you are little shy of parallel but overall I think it's good. Couldn't see if your knees were doing the same thing from the side angle though, so I would still address that!

I really tried to push them out. What is the purpose?

The purpose of pushing your knees out? Basically it's to protect your knees from injury....you really want to keep your knees tracking in the direction of your toes for best form. To be honest I think that's the most important thing when squatting. Don't worry if your knees go over your toes....when you are going parallel, it can happen, just make sure they are in line.