When the ad has been completed
When an error has occurred during ad playback
When 25% of the ad has been played
When the impression of ad creative occurs
When the ad has been loaded
When 50% of the ad has been played
When a user action has caused the ad to be muted
When a user action has caused the ad to be paused
When the ad has been playing for a duration equal to the signaled offset
When a user action has caused the ad to be resumed from paused state
When the ad has been skipped
When the ad is started
When 75% of the ad has been played
When a user action has caused the ad to be unmuted
When the ad has been clicked