From HTML Wiki
The <track> element allows authors to specify explicit external timed tracks for media elements. It does not represent anything on its own.
kind= subtitles/ captions/ descriptions/ chapters/ metadata
Transcription or translation of the dialogue, suitable for when the sound is available but not understood
Transcription or translation of the dialogue, sound effects, relevant musical cues, and other relevant audio information, suitable for when the soundtrack is unavailable
Textual descriptions of the video component of the media resource, intended for audio synthesis when the visual component is unavailable
Chapter titles, intended to be used for navigating the media resource.
Tracks intended for use from script.
src= valid non-empty URL potentially surrounded by spaces
Gives the address of the timed track data.
This attribute must be present.
charset= character encoding name
srclang= valid BCP47 language tag.
Gives the language of the timed track data.
This attribute must be present if the element's kind attribute is in the subtitles state.
Gives a user-readable title for the track.
See also global attributes.
This video has subtitles in several languages:
<video src="brave.webm"> <track kind=subtitles src=brave.en.srt srclang=en label="English"> <track kind=captions src=brave.en.srt srclang=en label="English for the Hard of Hearing"> <track kind=subtitles src=brave.fr.srt srclang=fr label="Français"> <track kind=subtitles src=brave.de.srt srclang=de label="Deutsch"> </video>
This element was introduced in HTML5 - 4.8.9 The track element.