New manual rule: Correct captions

[kengdoj]

New manual rule for correct captions:

• Modify Video element auditory content [f51b46] to only check for captions not evaluate caption quality
• Failed Ex 2 in Video element auditory content has captions now passes because this rule does not evaluate caption quality

Need for Call for Review:

This will require a 2 weeks Call for Review

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[dan-tripp-siteimprove]

On line 137 there is a problem that this PR didn't create, but I noticed it while reviewing: it says ariadescribedby="text". That's missing a hyphen. It should be: aria-describedby="text"

[kengdoj]

corrected. Thanks!

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[WilcoFiers]

The applicability ignores non-streaming videos. I think that's the right call here, the same video cannot fail both criteria, so you'll need to remove 1.2.4 from this.

Suggested change

	wcag20:1.2.4: # Captions (Live) (AA)
	forConformance: true
	failed: not satisfied
	passed: further testing needed
	inapplicable: further testing needed

[WilcoFiers]

You're making the assumption that a video with captions doesn't isn't also a media alternative. I think a video could in theory have incorrect captions, but still pass 1.2.2 if it's a media alternative. That's pretty theoretical though so I think an assumption about that is fine.