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August 14, 2022 00:11

embed for video only must have alternative


Severity Action
no actions


Rule ID Video 3
Definition embed elements used for video only content must have caption or text transcription of the audio content.
  • Text and audio descriptions provide a means for people who cannot see the video to understand the video content.
  • Some types of learning disabilities affect visual processing, text and audio descriptions provide an alternative way to understand the video content.
WCAG Success Criteria

1.2.1 Audio-only and Video-only (Prerecorded) (Level A, Primary Success Criterion)

Rule Category Audio/Video
Scope Element
Target Resources embed elements
  • embed
  • Use the video element instead of the embed element for video only content, since the video element provides better support for audio description tracks.
  • Include an audio track in the video that describes the video content.
  • Use aria-describedby attribute to point to a text description of the video only content.
Manual Checks
  • When audio descriptions are enabled on the media player, check to make sure the audio description can be heard.
  • If there is a audio description make sure the description accurately describes the video content.
  • If there is a text description make sure the description accurately describes the video content.
Informational Links

Element Results

Element Identifier Result Element Position Message

Column Definitions

Element Identifier
Information about the element associated with the result.
The information typically includes the tag name, accessible name or other information related to the rule requirements.
"Page" means that the result applied to the page. For example, the rule "One main landmark on the page" is a page level rule.
Element Position
The element position is based on the DOM order of elements in the page.
The element position maybe useful in helping to locate a specific element on the page evaluated (e.g smaller numbers are typically toward the beginning of a page and larger numbers typically toward the end of a page).
Element position 1 is the first element.
The highest element position is the last element.
Element position values for most rule/page results will not be consecutive since a rule only applies to a sub set of elements found on a page.