VAST Ad Events

In general, an ad event will fire when the playback of the ad triggers a mechanism that detects a specific activity. An ad event is reported by the VAST ad tag itself; not the video player.

A VAST ad unit can dispatch a number of events that report viewer activity. All events display the name of the VAST ad event that occurred:

EVENT	DESCRIPTION
AdClickThru	The ad tag reports that the viewer has clicked the video ad and was subsequently redirected to the specified click-through URL.
AdImpression	The ad tag reports that an ad impression has occurred. For reporting accuracy, the AdImpression event should only report one time for a given playback event. In addition, the following events report various types of video ad progress back to the player: AdVideoStart AdVideoFirstQuartile AdVideoMidpoint AdVideoThirdQuartile AdVideoComplete These events match their VAST events with the same names, as well as the “percent complete” events in the IAB Digital Video In-Stream Ad Metrics Definitions.
AdLoaded	The ad tag reports this event to indicate that the video ad is fully loaded and ready to play.
AdPaused	The ad tag reports that the viewer has paused the video ad. For more information, see the IAB's description for the pauseAd function.
AdResumed	The ad tag reports that the viewer has resumed play for this video ad. For more information, see the IAB's description for the resumeAd function.
AdStopped	The ad tag reports this event to indicate that the ad has stopped playing.
AdVideoFirstQuartile	The ad tag reports that the ad has passed by its first playback milestone, that is twenty-five percent of the primary video has played.
AdVideoComplete	The ad tag reports that the primary video has finished its playback.
AdVideoMidpoint	The ad tag reports that the ad has passed by its second playback milestone, that is, fifty percent of the video has played.
AdVideoStart	The ad tag reports that the ad has started its playback.
AdVideoThirdQuartile	The ad tag reports that the ad has passed by its third playback milestone, that is, seventy-five percent of the video has played.