ok few easy fixes here, first drop the ***** pad it puts the bar higher up on your back, personally all guys that ive seen use it dont squat heavy weights and use bad form, second a video from the back would help but make sure your legs are as wide as you are comfortable with, dont put them real wide or real close cuz someone told you, you need to decide what comfortable is, for me its a little over shoulder width, third make sure to push your knees out to the sides on the way out and keep tight the whole time, fourth at the bottom it looks like either two things, either the ***** pad is forcing you to bend forward due to its higher up on the back or youre losing your tightness, fifth until you get your form right use goblet squats, look them up and they will teach you how to push your knees and keep tightness while still grooving the motion