getPositionLong
Returns the time offset of the cue point from the beginning of the video, in milliseconds.
Note that this is only valid for PositionType.POINT_IN_TIME cue points.
Return
The position of the cue point as the number of milliseconds from the start of the video.
Throws
if you call this method on any CuePoint instance whose position type is not PositionType.POINT_IN_TIME.