Looks like the bar travels away from your shins. Work on having it scrape up your legs the entire time.
It's really hard to tell how your form is when the video is super fuzzy, dark, and you're wearing a huge sweater.
From the second set though, I can see that your knees are pointed more forward than they should be. Work on forcing your knees out to the side so that you get your hips as close to the bar as physically possible. (will require working up your flexibility) Point your toes out to the sides.
The 3rd set.... You set-up right, but then you squat down and straighten your feet more, and your knees go in.
Work on those things and I'm sure you'll have most of your problems sorted out! Looks good otherwise!