Two people can have the same idea. There’s even a term for it in science. Do you think Randall has watched every YouTube video that exists? I personally have never seen the video you linked, and while it has a decent amount of views, 13M over 12 years is pretty insignificant for other viral videos(for instance, nigahiga has multiple videos in the 30-60m range, and plenty more in the same 10-20m range like this video).