<video> elements do not contain a <track> element with [kind="description"]

<video> elements do not contain a <track> element with [kind="description"]

Updated
Appears in: Accessibility audits

Audio descriptions provide relevant information for videos that dialogue cannot, such as facial expressions and scenes.

How the Lighthouse video description audit fails #

Lighthouse flags <video> elements that are missing a <track> element with the attribute kind="descriptions".

The Lighthouse Accessibility score is a weighted average of all the accessibility audits. See the Lighthouse accessibility scoring post for more information.

How to add audio descriptions to video elements #

Add at least one track element to the video element with attribute kind="descriptions":

<video width="300" height="200">
<source src="marathonFinishLine.mp4" type="video/mp4">
<track src="captions_en.vtt" kind="captions" srclang="en" label="english_captions">
<track src="audio_desc_en.vtt" kind="descriptions" srclang="en" label="english_description">
<track src="captions_es.vtt" kind="captions" srclang="es" label="spanish_captions">
<track src="audio_desc_es.vtt" kind="descriptions" srclang="es" label="spanish_description">
</video>

The example above includes both audio descriptions for visually impaired users and captions for hearing impaired users. Captions make video elements usable for deaf or hearing-impaired users. See also <video> elements do not contain a <track> element with [kind="captions"].

Resources #

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