The video was created before the banner rotation feature was created.
Basicaly the way it wiorks is there are multiple areas one can place a banner. On each page refresh or view one of the banners from an active vendor is placed in the desired location. If you were to use multiple locations on the same page then the same banner will displayed in all locations.
This site
MiniTorque.com currently has the banner rotation module in place using the below the nav bar slot.