People love to see themselves as part of a larger event.
Specially if they can watch a slideshow of the event during the event.
Since I started photographing events, I've been able to provide the the organisers with a ready-to-play slideshow that they can use during or at the end of the event.
They usually use it as a "Thank-you for coming" gift and everyone loves it.
They cherish the moment that they have just witnessed but under a different perspective. Everything becomes more relevant when they see it in a video with music et al.