Those look decent, although there are two things you should work on - the stretch reflex and driving your knees out. One reason the squats are hard is that you do not effectively utilize the stretch reflex at the bottom. You go too slowly when you start your ascent. Think about driving up aggressively as soon as you get your depth. The video from the rear oblique looked like you may need to go a little deeper, but the side looked fine. Ultimately, judging depth from a video taken at head height is difficult to do. Also, let you knees come slightly more forward during the first half of the squat and drive them out farther to the sides.