There is included a method and apparatus comprising computer code configured to cause a processor or processors to perform controlling a delivery of a video conference call to a viewport, setting an event-based threshold with respect to the video conference call, determining whether the event-based threshold has been triggered based on an event and whether an amount of time having elapsed from another event is less than a predetermined amount of time, and further controlling the delivery of the video conference call to the viewport based on determining whether the event-based threshold has been triggered and whether the amount of time having elapsed from the other event is less than the predetermined amount of time.