Inform and persuade your target audience that your event is relevant to them. Get the word out!
Make your event interesting; use different methods to engage your audience, before, during and after the event.
Great video of an event can be used well after the event is over. Amazing content used as part of or to compliment an event will be remembered and talked about,and may even be Instagram able!
Video can capture the essence, create the mood and help relive the moments.