I can explain what an NFT is, but I can't explain why someone would pay that much for a video- they are two separate discussions. NFT stands for Non-fungible Token. Fungible means mutually interchangeable. As an example, a Bitcoin is fungible. If you have a Bitcoin and I have a bitcoin, we could exchange them and each still have the same value. We could also break our Bitcoin down- I could sell you half of my Bitcoin for an agreed upon price. NFTs code the token to remove those capabilities. Maybe I am not wording that right, but the way I think about it is that I could say "this one particular Bitcoin is equal to my car. It digitally represents my car." I could transfer that Bitcoin to you and it would convey transfer of ownership. Anyone in the world would be able to look on the blockchain and see that you now own that car. Of course, everyone has to agree to this system of ownership- but that is similar to how a paper deed or pink slip also conveys ownership even though it is just a paper. So here is where NFTs get interesting and potentially disruptive. You can now transfer ownership in a much more efficient, decentralized, and secure fashion that previously possible. I hate buying concert tickets from Ticketmaster. $60 tickets end up costing $100 with a variety of markups. So someone could build a decentralized ticket exchange market. In fact, a band could issue their tickets through the decentralized exchange and put parameters on those tickets on how they can be purchased and transferred. As to why someone would pay x amount for something- tokenizing something does create scarcity. Someone has decided that a video or some digital art is worth paying x amount, and so that is what it is selling for.