Trigger policy for HLS interstitial playback. Derived from CUE attribute in HLS manifests.
ONCE: Trigger the interstitial only once during the main content.
POST: Trigger the interstitial after the main content ends.
PRE: Trigger the interstitial before the main content starts.
Trigger policy for HLS interstitial playback. Derived from CUE attribute in HLS manifests.