Isaac, Taylor and Zac Hanson in a hotel room, playing “Wait and Bleed,” the lead single from Slipknot’s self-titled 1999 debut. Though the brothers initially declined to comment on the leaked video, they finally admitted yesterday that it was filmed on the road during the tour for their latest album, Shout It Out — and that they were practicing the ‘Knot classic as a warm-up for their next album, which will consist entirely of Slipknot covers.