NFTs cannot be divided into smaller denominations like bitcoin satoshis. They exist exclusively as a whole item that can never be broken down. See the video for more info on this.
NFT data is stored on the blockchain, each token cannot be destroyed, lost or duplicated. Ownership of these tokens is also immutable, which means collectors actually possess their NFTs, not the companies that create them.
Another benefit of storing historical ownership data on the blockchain is that items such as digital artwork can be traced back to the original creator, which allows pieces to be authenticated with no chance of buying a counterfeit art piece. The artist can also request a percentage of any resales in the future.