First of all, it's not a Dutch tv show host as the clip suggests, but a Belgian, it's kinda like mixing up Serbs and Croats....big BIG mistake.
Second, it wasn't fake, the show host was later fired because he couldn't stop laughing. As you can understand the joke was on the guy with the funny voice, every time he opened his mouth, the show host would burst into laughter, and eventually the whole audience got pissed with him, and so did his employer.