here are two documentaries about NFTs. the first one is about 20 minutes and is a succinct explanation.

the second is a ~2 hour long documentary of sorts diving into the history of the rise of crypto and what precipitated it, and how it lead into NFTs.

you should understand what these are. it's truly, literally, no exaggeration, nothing. you aren't even buying an image, or a video, or anything. all the images are is visual representations of a position on a database. a database is just a list. and you just. reserve a spot on that list basically. you aren't buying ownership over an image, or anything really, aside from the position on the database.