Welcome, Gmatt, whose name sounds like GMAT. Your grip is too narrow and you are on your toes for all of your reps. Watch the bar position video. You will need a wider grip. Also, don't let your knees go so far forward. You will need to lean over a little more and point your chest at the ground. Get yourself some proper weightlifting shoes. They will be of great assistance to you. Please consult the sticky for some tips on filming video. You have the right angle, but setting the camera on the ground makes things difficult.