GLOSSARY Video quartiles 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 Measurement points during video playback (25%, 50%, 75%, 100%) to evaluate ad performance. 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)