On Media Element Event Listener
Used for reporting media element events from publication content
Functions
The current time position in a media element changed.
A media element in the publication loaded in a visible page. This is always the first event fired for a specific media element.
A media element in the publication was unloaded from a visible page. This means that the media element is paused and cannot be interacted with anymore. No more events will be seen for that specific media element.
A media element in the publication was paused.
A media element in the publication started playing.
A media element have buffered enough data to start playback
A media element in the publication has finished seeking to a new position.
A media element in the publication don't have enough data to continue playback.