LOL! Yes, this video is pretty old, but I still find it incredibly funny XD And while I could see why someone could find it disgusting, I bet those guys did it for fun and, as most people said, simply to make people laugh. I myself did sort of a parody of TRC for a cosplay contest, since my boyfriend and I went as Sakura and Syaoran, and we said that in the last feather, Sakura will regain a memory of 300$ she lent Syaoran ^^uUu We intentionally "ruined" a very romantic scene, but of course, it was on purpose. And yes, there are other videos like this, like a parody of the fourth Fullmetal Alchemist opening, Rewrite:
http://youtube.com/watch?v=LHgWrxgKa8A (less funny, but still... XD).