The kind property contains a string indicating the category of video contained in the VideoTrack. The kind can be used to determine the scenarios in which specific tracks should be enabled or disabled. See Video track kind strings for a list of the kinds available for video tracks.


var trackKind = VideoTrack.kind;


A DOMString specifying the type of content the media represents. The string is one of those found in Video track kind strings below.

Video track kind strings

The kinds available for video tracks are:

A potential alternative to the main track, such as a different video take or a version of the soundtrack with only the music and no dialogue.
A version of the main video track with captions burnt in.
The primary video track.
A sign-language interpretation of an audio track.
A version of the main video track with subtitles burnt in.
A video track containing a commentary. This might be used to contain the director's commentary track on a movie, for example.
"" (empty string)
The track doesn't have an explicit kind, or the kind provided by the track's metadata isn't recognized by the user agent.


Specification Status Comment
HTML Living Standard
The definition of 'VideoTrack: kind' in that specification.
Living Standard  

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
kindChrome ? Edge Full support 12Firefox ? IE ? Opera ? Safari Full support YesWebView Android ? Chrome Android ? Firefox Android ? Opera Android ? Safari iOS Full support YesSamsung Internet Android ?


Full support  
Full support
Compatibility unknown  
Compatibility unknown