This is André Schürrle. He's a very, very good footballer. A lot of people would recognise him as a star for both Wolfsburg and the World Champion German national team. This German TV host, however, did not.
Sofia Kats, from gaming channel Rocket TV, was pranked by her colleagues into doing the interview, which she thought was with Counter-Strike player Christian Chmiel. Schürrle does a great job of keeping up appearances, with the interview lasting around 1:45 before everyone kinda breaks down.
Redditor sueha has a rough trasnslation of the opening exchanges:
Host: "I'm excited to do this spontaneous interview. Since it was so spontaneous, I was only given a Wikipedia article and I may now say hello to Christian Chmiel, who was 2008 ESL pro-series champion and is now back - hello, Christian."
Schürrle: "Hello. Nice to be here!!"
Host: "I'm surprised you can speak German because in my article it says you're from England and I wanted to talk English to you but you said "wie geht's" (German for 'how are you')"
Schürrle: "Yeah, my Mum is German and my Dad is from England but that may not be part of your Wikipedia article."
Host: "Nice, so you were raised bilingually?"
Host: "I have a few questions for you. Do you think that Denial won deservedly against Revenge in this year's championships?"
Schürrle (laughing): "Once again please?"
Host: "OK! Why are you laughing?"
Schürrle: "It's just... I played a few times against him and yeah..."
Host: "So he is a no-name to you?"
Schürrle: "Yeah, he had no chance, one has to say."
Host: "OK, but at the tournament... do you think that Denial won deservedly against Revenge?"
Schürrle: "Yeah, definitely, I think it was a good ga-hahahaha"
Host: "Why is everybody laughing? Are you dumb? I mean not you (to Andre)"
Schürrle: "I guess I have to clear up something here..."