WHATWG HTML specifies `kind="descriptions"` for `<track>` so authors can provide a script for audio descriptions for associated videos: https://html.spec.whatwg.org/multipage/media.html#attr-track-kind-keyword-descriptions WHATWG HTML also provides parsing rules (including for making them extended audio descriptions): https://html.spec.whatwg.org/multipage/media.html#playing-the-media-resource The current WCAG advisory technique guides authors to use `<track>` with `kind="descriptions"` to provide a source for the browser to provide synthesized audio description: https://www.w3.org/WAI/WCAG22/Techniques/html/H96 A caveat is that the latest update from WebVTT CG Report suggests WHATWG HTML may have jumped the gun: > The majority of the current version of this specification is dedicated to describing how to use WebVTT files for captioning or subtitling. There is minimal information about chapters and time-aligned metadata and nothing about video descriptions at this stage. https://w3c.github.io/webvtt/#introduction In other words, I would love to see this supported but if WHATWG HTML is punting to WebVTT and WebVTT has not fully specified it, then perhaps WebKitcan either: 1. take the lead and implement this, helping cement behaviors; or 2. push for clarity in WHATWG HTML using its outsized position of influence.
<rdar://problem/119949632>