Just watched the video. Ultimately, it's just a map with a bunch of World of Warcraft exported models and textures. Accompanied by, what looks like, some decent GUI triggers. The terrain isn't that great though because the scale of the objects is incorrect (too small) and don't align with the real terrain in the actual World of Warcraft. A good start I suppose, but dancing WoW characters doesn't make the map a WoW conversion.