Made this some time ago. It's the song 'Awake' by The Claypeople (which are Slipknot, Static-x and Disturbed). But the last two bands suck, so I like to think it's just Slipknot.
The music video is a series of recordings of the game Runescape by Jagex ltd., edited in flash, and with some graphical additions, in order to actually make it a music video. No amazing flash skills involved here, just a bunch of editing. Ah well, see for yourself.