What are the limits for playback beacon URLs?
The playback beacons can be used to track how much of the video actually plays. The application automatically runs beacons at the 0%, 25%, 50%, 75%, and 100% positions. You can set up to three third-party playback beacon URLs per playback point. Depending on which playback points you set, the beacons can be triggered when the ad starts playing (0% position) and when it has played 25%, 50%, 75%, and 100%. The results of this user activity tracking are available in the video performance reports.