That's a different video by a different person. The link below is the video this gif came from. They have it on Youtube but for some reason the fps is horrible and quality is not as good. So if you don't mind niconico here it is. Just remember to turn off the comments for the love of god. Added the YT link.
This is a video with the same modeling but I don't know if it is from this video because the capture is so short. Either way this one is a great song and good quality.
Artist who? This is merely a gif of the video. If you meant the maker of the model, then it's Yoshitsune. But the one that made it looks so great is hori , thanks to his editing. You can also check his other video http://www.nicovideo.jp/watch/sm24088871
