Cameo.
Where you pay a C-list celeb money and give him or her a script to say exactly what you tell them to say.
I could pay Biff $150 or "Guy who played the Principal and called everybody a slacker" $50 right now to say "wow can't wait for the upcoming JJP masterpiece BTTF!" and he'd do it, just like the proud boys got Bret Farve to say some white power shit and he didn't even realize it. It wouldn't mean the actor knows what "JJP" means, just that they have paypal and were happy to take the gig.
I guess what I'm trying to say is maybe don't take these clips so seriously.