I came across a helpful article from Omnipress.  It highlights different avenues for using video to raise awareness about your conference and build event attendance.

American Society of Association Executives (ASAE)
Capturing highlights from their 2008 meeting as well as video interviews with association executives in their “This Week in Associations Vodcasts

CFMA Conference 2009 Las Vegas
Promotional video to promote upcoming event.
http://www.youtube.com/watch?v=yrIA1LXe4vc

The American Physical Therapy Association
Showcasing many great reasons to join APTA
http://www.youtube.com/watch?v=D6j-YOr4Qqs

American Watercraft Association West Coast Freedom Ride 2008
Captures their event in a slide show like video format.
http://www.youtube.com/watch?v=fj1X_Oc43_E

2008 National Association of Realtors Convention in Orlando, Florida
Interviews direct from the convention floor. Great way to capture the experience
http://www.youtube.com/watch?v=vsKI6mUAQis

Here is a link to the full article.  http://blog.omnipress.com/2009/01/5-ways-associations-are-using-video/