The anonymous graffiti artist Banksy has published a video detailing how he installed a shredder into the frame of one of his best-known works, Girl With Balloon. The piece was the final item in an auction at Sotheby's in London on Friday night and its sale price equalled the artist's previous auction record of £1.04m. Just moments after it was sold the piece self-destructed Subscribe to Guardian News on YouTube ► http://bit.ly/guardianwiressub Banksy auction stunt leaves art world in shreds ► https://www.theguardian.com/artanddesign/2018/oct/06/banksy-sothebys-auction-prank-leaves-art-world-in-shreds-girl-with-balloon Support the Guardian ► https://theguardian.com/supportus The Guardian ► https://www.theguardian.com The Guardian YouTube network: The Guardian ► www.youtube.com/theguardian Guardian Football ► http://is.gd/guardianfootball Guardian Sport ► http://bit.ly/GDNsport Guardian Culture ► http://is.gd/guardianculture