I couldn’t find the Flintstones movie from 1994 anywhere but googling it I found it here https://archive.org/details/the-flintstones_202304 and you can either download it via torrent or directly. On top of it it says that the movie is CC0 which means Public Domain. But that can’t really be, it’s only 29 years old.
That must be pirated, or not?
I hope that’s the case here. The sad thing is that not having the rights to something doesn’t stops you from filling a claim, even scammers fill DMCA claims over original content, the movie is already down from archive.