What does WCAG 2.2 require for captions, sign language and keyboard operation of media, and what does W3C WAI say about presenting sign language?

Partially verified: the curator re-read S33, S35; S34, S36 were not re-read by the curator and rest on the producer's pinned reading. WCAG 2.2 requires captions for prerecorded audio in synchronized media at Level A (except clearly labelled media alternatives for text) and sign language interpretation only at AAA; WAI notes most policies do not require sign language, judges sign-language avatars not adequate, and advises placing the signer (usually bottom right, above tickers) with a visible toggle. These are content criteria, not legal duties. Curator qualifications: Partially verified: the curator re-read S33, S35; S34, S36 were not re-read by the curator and rest on the producer's pinned reading. Curator GET 2026-10-23 of the sources not re-read (mechanical source evidence, not semantic verification): S34: HTTP 200, bytes equal to the producer pin; S36: HTTP 200, bytes equal to the producer pin. Documents read 2026-10-22; no bag created or validated. SC 2.1.1 keyboard text and Understanding pages (S34, S36) not re-read. Limitations: Documents read 2026-10-22; no bag created or validated. Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

{
  "citations": [
    {
      "url": "https://www.w3.org/TR/2024/REC-WCAG22-20241212/",
      "note": "W3C WCAG 2.2 REC 2024-12-12, SC 1.2.2 and SC 1.2.6; W3C WAI: Sign Languages (live)"
    },
    {
      "url": "https://www.w3.org/WAI/WCAG22/Understanding/sign-language-prerecorded.html",
      "note": "W3C WCAG 2.2 REC 2024-12-12, SC 1.2.2 and SC 1.2.6; W3C WAI: Sign Languages (live)"
    },
    {
      "url": "https://www.w3.org/WAI/media/av/sign-languages/",
      "note": "W3C WCAG 2.2 REC 2024-12-12, SC 1.2.2 and SC 1.2.6; W3C WAI: Sign Languages (live)"
    },
    {
      "url": "https://www.w3.org/WAI/WCAG22/Understanding/keyboard.html",
      "note": "W3C WCAG 2.2 REC 2024-12-12, SC 1.2.2 and SC 1.2.6; W3C WAI: Sign Languages (live)"
    }
  ]
}