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Applicability
This rule applies to every non-streaming video element that is visible where the video contains audio and a track element with a kind attribute value of descriptions.
Expectation
The visual information of each test target not available through its audio is described with a description track element.
Note: Multiple description track elements may be useful for different languages, but at least one must match the language of the video.
Assumptions
- 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.