VAST stands for Video Ad Serving Template: it is the technology used by a player to interact with multiple ad sources.
Any player playing an ad is based on VAST technology and is usually served as a stand-alone format.
Our VAST Unit offers a code which can deliver video ads from our Premium Buyers on your own proprietary video player even if you choose a different advertisement platform.
Learn how to add pre-roll advertisements with our VAST Unit.
Learn more about the VAST standard on http://www.iab.net/vast.