HTML track descriptions
Track:0:- label = English subtitles
- kind = subtitles
- lang = en
- readyState = 0
- mode = disabled
Track:1:- label = Deutsch subtitles
- kind = subtitles
- lang = de
- readyState = 1
- mode = showing
Track:2:- label = English chapters
- kind = chapters
- lang = en
- readyState = 0
- mode = disabled
