GLOSSARY Video Player Ad Interface Definition (VPAID) 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 Standard for interactive video ads enabling communication between player and ad server. Back to index Related concepts VAST (Video Ad Serving Template)vCPM (Viewable Cost Per Mille)VendorVideo Ad Completion RateVideo AdvertisingVideo Completion Rate (VCR)Video Multiple Ad Playlist (VMAP)Video on Demand (VOD)