position
The playback position at which the ad break is scheduled to start. Default value is "pre".
Possible values are:
"pre": pre-roll ad (for VoD and Live streaming)
"post": post-roll ad (for VoD streaming only)
fractional seconds: "10", "12.5" (mid-roll ad, for VoD and Live streaming)
percentage of the entire video duration: "25%", "50%" (mid-roll ad, for VoD streaming only)
timecode hh:mm:ss.mmm: "00:10:30.000", "01:00:00.000" (mid-roll ad, for VoD streaming only)