SONG COMMERCIAL TRAILER RANT
Moonlight Sonata, Beethoven
Indeed it is Moonlight Sonata, not Tempest.As soon here: https://www.youtube.com/watch?v=4Tr0otuiQuU
He begins with Moonlight Sonata, but *SPOILER ALERT*the song that he plays to unlock the video from Hauser is Tempest. Link: http://www.youtube.com/watch?v=CqDkDyA7QHE
He actually plays both songs. He begins to play Moonlight Sonata in the beginning. The he stops, laughs to himself and starts to play Tempest (3rd movement) which unlocks the hologram message.