Optional
defaultOptional
idOptional
in_If this field is present, it means that references for this text track are available in the associated video's manifest
Optional
kindkind of text track
Optional
labellabel for the track
Optional
mime_mime_type for the track
Optional
sourcesarray of sources for .vtt files (note that in many cases there will be one source with a src value identical to the text_tracks.src value, but this array is included in case there are multiple protocols available, such as http and https)
Optional
src?: stringOptional
srcURL for the .vtt file
Optional
srclang2-letter language code, such as "en" or "ko"
whether this is the default track