Without being able to see for sure because of the lighting and your dark clothes, it looks like you're getting deep enough. Block of wood might be helpful. Are you making sure you're pushing your knees out? If you're having trouble coming up correctly out of the bottom, imagine a spot somewhere on your midback, that you want to drive straight up. If you're leaning too far forward, move that spot higher up on your back, and lower if you lose too much hip drive. Don't rush the ascent; always concentrate on going up smoothly and in control, paying attention to the bar path / back angle.