There is a clip on a Instagram "Banksy" account: https://www.instagram.com/banksy/ https://www.instagram.com/banksy/ I would like to know the details on how h

There is a clip on a Instagram "Banksy" account: https://www.instagram.com/banksy/ https://www.instagram.com/banksy/ I would like to know the details on how he pulled it off, I refuse to believe the auction house was unaware of the stunt.