kind

How the text track is meant to be used. If omitted the default kind is <code>subtitles</code>. If the attribute is not present, it will use the <code>subtitles</code>. If the attribute contains an invalid value, it will use <code>metadata</code>. (Versions of Chrome earlier than 52 treated an invalid value as <code>subtitles</code>.) The following keywords are allowed:

• <code>subtitles</code>
• Subtitles provide translation of content that cannot be understood by the viewer. For example dialogue or text that is not English in an English language film.
• Subtitles may contain additional content, usually extra background information. For example the text at the beginning of the Star Wars films, or the date, time, and location of a scene.
• <code>captions</code>
• Closed captions provide a transcription and possibly a translation of audio.
• It may include important non-verbal information such as music cues or sound effects. It may indicate the cue's source (e.g. music, text, character).
• Suitable for users who are deaf or when the sound is muted.
• <code>descriptions</code>
• Textual description of the video content.
• Suitable for users who are blind or where the video cannot be seen.
• <code>chapters</code>
• Chapter titles are intended to be used when the user is navigating the media resource.
• <code>metadata</code>
• Tracks used by scripts. Not visible to the user.