`<track>`

Timed text for media: captions, subtitles, descriptions, chapters.

Baseline: Widely available · Media & embedded content

When to use it

kind='captions' with srclang and label on every video containing speech; default preselects one.

Subtitles translate; captions also transcribe sound effects — pick the kind honestly.

<track kind='captions' src='/media/intro.en.vtt' srclang='en' label='English' default>

Source — this snippet needs a fuller context to render.