the art itself is really good but artists that can draw like that are a dime a dozen
what makes him extraordinary is he doesn't need pre-sketches or perspective lines or photo reference to set up or guide his drawings. it's like he just pictures it in his head and is able to transfer it on paper. and to do it on a wall-sized canvas makes it more amazing.
at least that's what I can tell from the video
his depth perception is also amazing. when I draw on a larger scale like that, a lot of times i'll draw an arm too long or a body part too big once I step back and look at it. but this guy hits everything in the right proportions. awesome