The song starts a little more than a minute into the video.
BTW, people paid $1,300 to go to this event.
Goodbye cruel social world...
From Laughing Squid:
The project, which was created for Delta Air Lines at TED2014, used an algorithm to determine a "Soul Mate" for each user after their Twitter stream, and then displayed that social stream as well. After leaving, each half of the "Soul Mate" received a tweet connecting them.