Video Tracking

Method	Description
trackVideo:viewId:title:thumbnail:engagedTime:duration:playState:contentTime:playerTime:	Start tracking a video view
updateVideoPlayState:duration:engagedTime:contentTime:playerTime:	Update an in-flight video's state

Play states

Value	Meaning
s1	Unplayed
s2	Played
s3	Paused / stopped
s4	Finished