CLEAN : Not for sensitive stomachs: 'vomit vault' churns up in London

The video explores the Vomit Vault of London, an exhibition focused on puke, and discusses its societal and economic implications. Initially perceived as disgusting, vomit is reinterpreted as a sign of economic recovery. The exhibition includes NFTs, potentially the cheapest on the market, highlighting a unique intersection of art and economy.

What does the speaker mean by saying vomit can be seen as an index of economic recovery?

What are NFTs and how are they related to the works mentioned in the exhibition?