I'm pretty sure I saw a video of this kid last year. He surprised me with his coordination and footwork in the other video. In this video, not much too see. One thing that is striking is that he is not skinny. Most kids that age who hit 7 feet are thinner.
I think Hibbert's success will make people doubt him less due to his foot speed. Hibbert fell in the draft due to foot speed concerns, but he is part of one of the best defenses in the league.
I'm not sure that 'raw'-ness is something to focus on here considering that guys his size don't have to be that developed to start in the NBA. So long as he can catch the ball, time blocks, have a mind for the game, and shoot a layup, he can do a lot of damage. This is also not an Olowakandi who started playing organized ball in college. This kid has been playing a while.