The band is “Die Antwoord”, a band from South Africa. This is not the full video for “Fatty Boom Boom”, which tells the story of Lady Gaga visiting South Africa and ‘discovering’ them, which turns out poorly for her.
My opinion? This band is spastic… spastic in a completely awesome way. Check out some of their other songs as well. Here’s another one for you:
Strangely, I was looking up images of Cthulhu when I came across this video, and I think Cthulhu would approve.