WCAG Requirements for audio and video

  Captions Transcript Audio Descriptions (AD) Sign Language
Pre-recorded Multimedia
  • A: MUST
  • AA: MUST
  • AAA: MUST
  • A: SHOULD
  • AA: SHOULD
  • AAA: MUST
  • A: MUST
  • AA: MUST
  • AAA: MUST
  • A: MAY
  • AA: MAY
  • AAA: MUST
Pre-recorded Video-only n/a
  • A: MUST*
  • AA: SHOULD
  • AAA: MUST
* A: Transcript OR Audio Descriptions
  • A: MUST*
  • AA: MUST
  • AAA: MUST
* A: Transcript OR Audio Descriptions
n/a
Pre-recorded Audio-only n/a
  • A: MUST
  • AA: MUST
  • AAA: MUST
n/a
  • A: MAY
  • AA: MAY
  • AAA: MAY
Live Multimedia
  • A: SHOULD
  • AA: MUST
  • AAA: MUST
n/a
  • A: MAY
  • AA: MAY
  • AAA: MAY
  • A: MAY
  • AA: MAY
  • AAA: MAY
Live Video-only n/a
  • A: MAY
  • AA: MAY
  • AAA: MUST
  • A: MAY
  • AA: MAY
  • AAA: MAY
n/a
Live Audio-only
  • A: MAY
  • AA: MAY
  • AAA: MUST*
* AAA: Captions OR Transcript
  • A: MAY
  • AA: MAY
  • AAA: MUST*
* AAA: Captions OR Transcript
n/a
  • A: MAY
  • AA: MAY
  • AAA: MAY