https://docs.aws.amazon.com/mediatailor/latest/apireference/API_AdMarkerPassthrough.html
AdMarkerPassthrough - AWS Elemental MediaTailor
For HLS, when set to true , MediaTailor passes through EXT-X-CUE-IN , EXT-X-CUE-OUT , and EXT-X-SPLICEPOINT-SCTE35 ad markers from the origin manifest to the...
aws elementalmediatailor