Merge pull request w3c#834 from w3c/mjm-add-media-alternative-prerecorded

Add 1.2.8 Media Alternative (Prerecorded) Level AAA SC

Author: maryjom

recommendations-for-level-AAA-success-criteria.md

@@ -5,6 +5,7 @@ Recommendations for Level AAA Success Criteria
 The WCAG2ICT Task Force is in process of adding guidance for Level AAA success criteria. We are seeking feedback on the following sections:
 
 - [1.2.7 Extended Audio Description (Prerecorded)](#extended-audio-description-prerecorded)
+- [1.2.8 Media Alternative (Prerecorded)](#media-alternative-prerecorded)
 
 The rest of the Level AAA criteria, as noted with editor's notes in the sections below, are still under development.</div>
 
@@ -47,9 +48,20 @@ Audio descriptions (also called "video descriptions", "descriptive narration", a
 ##### media-alternative-prerecorded
 
 ###### Applying SC 1.2.8 Media Alternative (Prerecorded) to Non-Web Documents and Software
-<div class="ednote">
 
-Guidance currently under development by the WCAG2ICT Task Force. See GitHub <a href="https://github.com/w3c/wcag2ict/issues/534" target="_blank">Issue 534</a>.</div>
+This applies directly as written, and as described in [Intent from Understanding Success Criterion 1.2.8](https://www.w3.org/WAI/WCAG22/Understanding/media-alternative-prerecorded#intent).
+
+<div class="note wcag2ict">
+
+As described in Intent from Understanding Success Criterion 1.2.8, this success criterion is concerned with providing an accessible alternative to time-based media such as audio visual material. This accessible alternative could be in text form, may provide a running description, and could read something like a book. 
+
+When audio visual media is redundant to other forms of information (such as in text and as audio guidance), the intent of this Success Criterion would be satisfied.</div>
+<div class="note wcag2ict">
+
+Prerecorded media is defined as information that is not live. Media content that is generated by a computer on-demand, such as by generative AI is not considered live.</div>
+<div class="note wcag2ict">
+
+See also the [Comments on Closed Functionality](#comments-on-closed-functionality).</div>
 
 ##### audio-only-live
 

success-criteria-problematic-for-closed-functionality.md

@@ -80,5 +80,5 @@ For non-web software on ICT with closed functionality, those who implement this
 Level AAA success criteria are not considered mandatory, and per WCAG 2, "It is not recommended that Level AAA conformance be required as a general policy for entire sites because it is not possible to satisfy all Level AAA success criteria for some content." This is especially true for ICT with closed functionality, where there may not be available assistive technology and/or platform support (including user agents, such as browsers) to satisfy these criteria. The applicability of the following WCAG 2 Level AAA success criteria are considered problematic to apply to ICT with closed functionality:
 
 <ul>
-<li><a href="#non-text-content">Placeholder SC link</a> — Placeholder description of why it's problematic.</li>
+<li><a href="#media-alternative-prerecorded">1.2.8 Media Alternative (Prerecorded) (Level AAA)</a> — One of the options available to authors for Success Criterion 1.2.8 is providing a media alternative that is text which, in the absence of connected assistive technology, would need to be made available in different modalities.</li>
 </ul>