Represents a text track which can be selected to download for offline playback
The label for this track.
The IETF BCP 47 language tag associated with the text track.
Tells if a text track is forced. If set to true it means that the player should automatically select and switch this text track according to the selected audio language.
If set to
true, this track would be considered as default, i.e. it will be enabled automatically once the source has loaded.