Yesterday I found myself watching Rayman Sings Sexbomb and while scrolling through the comments I found one that says; "I feel like this is like reverse lost media, in that we have the media not only found, but well-known about for years and widespread, but nobody has any idea where it came from or how it spread other than it was made by the original creators." This got me thinking, what are some genuine other cases of this?
This would technically be called unidentified media, lostwave is a massive example of this.
There's also a Gumby-like claymation series made in the 80's that has no known creator yet somehow got a few dubs. It's partially found and has an article on the wiki iirc. Although I cannot for the life of me remember what it's called.
I mentioned this on another thread but the infamous "girl dancing" screamer (the one with the TV displaying static) has an unknown creator.