You can find similar videos as harmonica beatboxing on youtube. If thats not what you were asking, then the harmonica can be found in minimalist music and is a feature of jazz, blues, rock, country and american folk.
kids pretty good but theres a guy in southern Kentucky in a small town called Monticello that blows this kid away. Theres a video here on RU-vid of this guy doing stuff you wouldnt believe with a harmonica. Hes so damn good that he can mk it sound like theres more then one playing. His harmonica/bear boxing is 100 times better then this.
Another American trying to assert domimance over others achievements simply because it goes against their nationalistic pride of always being first place... go on, show us the wares.