<video> element visual content has audio description
This rule is not required for conformance to any accessibility requirements.
This rule checks that prerecorded
<video> elements have all visual information also contained in the audio.
- The visual information of each test target is available through its audio, or through an audio description track.
- This rule assumes that a mechanism is available to start the video and that the video element is not simply used to display the poster.
- This rule assumes that the language of each test target can be correctly determined (either programmatically or by analyzing the content), and sufficiently understood.
There are only a few implementations of video players (without third party technologies) that support audio description tracks at the time of writing.
This document includes material copied from or derived from https://act-rules.github.io/rules/1ea59c/. Copyright © 2021 W3C® (MIT, ERCIM, Keio, Beihang).