A lot of popular songs have the exact same riff, so this guy picked one, and then did a pretend contest with it. He played a very familiar three-note sample on a piano, and then cut to himself making his "guess" by pulling the song up on the computer
He finds six songs in a row with that EXACT riff, but none are right. The song he's looking for is"Ho Hey"byThe Lumineers.
THE ANSWERS ARE BELOW:
(The other six are Chris Medina "What Are Words"
One Direction "They Don't Know About Us"
Passenger "Let Her Go"
Per Gessle"Om Du Bara Vill"
Lady Gaga "Always Remember Us This Way"
Taylor Dayne "Tell It To My Heart".)