United States Marine Corps Site (and how do they do that):

The US Marine Corps site at: http://www.marines.mil/Pages/DefaultPage.aspx and the Marine Corps University site at: http://www.mcu.usmc.mil/mcu/mcu_welcome_packet/index.htm both show either a video connected to a navigation bar or an emblamatic icon emblazoned on its opening page.  The same type of video feeds but from several images displayed on the opening page and then clicked to the youtube video are shown at: http://video.google.com/.  I would like to be able to do both (or all three of those creations) as effectively as those site designers and creators do.