A videocast from zombilly.blogspot.com. The website, and a lot of the video, is in Portuguese (and Spanish) so I can't tell you much more about him/her/them, but if you check their myspace it is clear these are one-man-band afficionados too! Long live Brazil!
A battle of one-man-bands! Awesome!
According to the description these are the one-man-bands in the video:
'Bands: El Monstro Orquestra (México), Amazing Onemanband (Uruguai), The Fabulous GoGo Boy From Alabama (SP), O Lendário Chucrobillyman (PR) and Chuck Vilence & His Onemanband (SC).'
(here is another post about the event in Portuguese)