Ensure video elements have audio descriptions

Audio descriptions provide relevant information for videos that dialogue cannot, such as facial expressions and scenes. Lighthouse reports any <video> elements that are missing a <track> element with the attribute kind="descriptions".

How to fix the problem

To fix the problem, 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>

Learn more in <video> elements must have an audio description <track>.

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 Ensures <video> elements have captions.

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