This video's creator, PowSound, is just a frustrated father who wants his baby daughter to say that he is is her favorite parent.
He does everything he can throughout the interrogation. He bribes her with food and a pony. But even when she admits dad's her favorite, she can't do it without lauging.
According to the video's creator, "What takes place is a ruthless contest of cunning and skill... with one of us clearly out of our league."