NFTs – or non-fungible tokens – are effectively a digital proof of sale, and it's fair to say they’re having a moment. Most recently an iconic YouTube home video from 2007 called "Charlie bit my finger" has been sold for a six-figure sum as an NFT, with the family who made it pledging that the winning bidder is now "the sole owner of this lovable piece of internet history". So how exactly do NFTs work? And could they transform the way we do business in the future? We speak to financial technology expert James Bowden, a lecturer at the University of Strathclyde.