Does Jukin Media definitely own the rights to everything they claim?
As I recall, some stock photograph companies were vacuuming up public domain photos, even ones that someone definitely owned, and claiming them as their own.
I doubt that would be a problem with the current hot viral stuff that people are making “reaction videos” of, but older stuff that’s been around for ages, and the origin more obscure would be tempting targets to claim. “Dancing Baby? That’s ours, pay up!”