The thing with his animation, is the camera choreography and the whole fighting scenes are amazingly well thought out and animated.
HOWEVER, the characters just don't have that human feeling when they're NOT fighting. They just stand there, unanimated. This is, of course, because he focused on fight animations and choreography. But if he gave some graphical polish to the environment, and some more detailed animation during slow-paced scenes, however subtle, it would be perfect.
And the ending should be changed... it just doesn't fit.
And he wasn't hired because he is amateur compared to real animators. This is only because animating for him is a hobby, not a job. He wasn't properly trained, since he learned it by trial and error, and generally fidling around with the programs. Unlike professionals, who are given lessons, and learn the way it should be learned.
But the whole video is still amazing.