It was a Nintendo event in spain, because that living room was done for it and you could go and try the console, but people cant understand why theres also a BF3 video there.
The guy is an idiot, trust me, he cant even edit videos properly and much less make that good fake.
As he has turned into an internet spanish celebrity (because he is so bad his good) im pretty sure the guy just sended the videos of him playing and his "song" to someone who knows how to edit a video to do this "videoclip", and while the zelda and aliens parts are real, he also edited a part where he does like the guy is playing BF3 because in that part of the "song" he is talking about playing that game.
Thats probably what happened.
So yes he played the wii u at an event.
BF3 part is the only fake part because in that part Salvador Raya is "singing" about BF3.
Theres no more to it.