Slipknot live at the rading festival (i have only ever found these 5 clips on the net)
(links)
http://rapidshare.com/files/103445949/_sic__at_the_reading.mpg
http://rapidshare.com/files/103430324/slipknot_-_MyPlague_live_at_the_reading.mpg
http://rapidshare.com/files/102688899/Slipknot_-_Purity_live_at_the_reading.mpg
http://rapidshare.com/files/102682681/Slipknot_-_Eeyore_live_at_the_reading.mpg
http://rapidshare.com/files/102670855/Slipknot_-_Disasterpiece_live_at_reading.mpg