GLOSSARY Vendor A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Provider or company offering services or technology in the ad supply chain. Back to index Related concepts VAST (Video Ad Serving Template)vCPM (Viewable Cost Per Mille)Video Ad Completion RateVideo AdvertisingVideo Completion Rate (VCR)Video Multiple Ad Playlist (VMAP)Video on Demand (VOD)Video Player Ad Interface Definition (VPAID)