I don’t know this band and I can’t understand the lyrics, but enlarge it to fullscreen and just try to look away. I dare you.
From the info on the youtube page:
This music video was shot for Sour’s ‘Hibi no Neiro’ (Tone of everyday) from their first mini album ‘Water Flavor EP’. The cast were selected from the actual Sour fan base, from many countries around the world. Each person and scene was filmed purely via webcam.
Director: Masashi Kawamura + Hal Kirkland + Magico Nakamura + Masayoshi Nakamura
SOUR official site: http://sour-web.com
You can also find the lyrics there.