Says Gotye from his official YouTube channel:
Reluctant as I am to add to the mountain of interpretations of Somebody That I Used To Know seemingly taking over their own area of the internet, I couldn't resist the massive remixability that such a large, varied yet connected bundle of source material offered. Thank you to everyone who has responded to Somebody That I Used To Know via YouTube. It's truly amazing!
The video is a mashup of his smash hit “Somebody That I Used To Know” that stitches together the many individuals who’ve posted covers of themselves playing the song. Take out the words from this song, and it's still music to my ears. Beautiful; just beautiful.