Merging changes synced from https://github.com/MicrosoftDocs/windows-dev-docs (branch docs)

Author: Learn Build Service GitHub App

hub/apps/publish/publish-your-app/msix/screenshots-and-images.md

@@ -116,15 +116,20 @@ Follow these recommendations to make your trailers effective:
 - Use a different thumbnail for each trailer so that customers know they are unique.
 - Because some Store layouts may slightly crop the top and bottom of your trailer, make sure key info appears in the center of the screen.
 - Frame rate and resolution should match the source material. For example, content shot at 720p60 should be encoded and uploaded at 720p60.
+- To make trailers more accessible for users with disabilities, you can upload closed captions and audio descriptions:
+  - Closed captions provide text alternatives for audio for individuals who are deaf or hard of hearing.
+  - Audio descriptions help provide audio alternatives for visual elements for individuals who are blind or have low vision.
 
 You must also follow the requirements listed below.
 
 **To add trailers to your listing:**
 
-1. Upload your trailer **video file** in the indicated box. A drop-down box is also shown in case you want to reuse a trailer you have already uploaded (perhaps for a Store listing in a different language).
+1. Click on **Upload** and upload your trailer **video file** in the indicated section. A drop-down box is also shown in case you want to reuse a trailer you have already uploaded (perhaps for a Store listing in a different language).
 2. After you have uploaded the trailer, you'll need to upload a **thumbnail image** to go along with it. This must be a .png file that is 1920 x 1080 pixels, and is typically a still image taken from the trailer.
 3. Click the pencil icon to add a **title** for your trailer (255 characters or fewer).
-4. If you want to add more trailers to the listing, click **Add trailer** and repeat the steps listed above.
+4. To add a closed caption file, click the "Upload" button in the closed captions section and select a Web VTT (.vtt) file. The file size must be less than 50 MB.
+5. To add an audio description file, click the "Upload" button in the audio descriptions section and select an MP3 (.mp3) file. The file size must be less than 500 MB.
+6. If you want to add more trailers to the listing, close the panel, click **Upload** and repeat the steps listed above.
 
 > [!TIP]
 > If you have created Store listings in multiple languages, you can select **Choose from existing trailers** to reuse the trailers you've already uploaded. You don't have to upload them individually for each language.
@@ -140,6 +145,8 @@ When providing your trailers, be sure to follow these requirements:
 - The thumbnail must be a PNG file with a resolution of 1920 x 1080 pixels.
 - The title can’t exceed 255 characters.
 - Do not include age ratings in your trailers.
+- The closed caption file must be in Web VTT (.vtt) format and the file size must be less than 50 MB
+- The audio description file must be in MP3 (.mp3) format and the file size must be less than 500 MB  
 
 > [!WARNING]
 > The exception to the requirement to include age ratings in your trailers applies **only** to trailers in the **Microsoft Store** that are shown **on the product page**. Any trailer posted outside of Partner Center, that is not intended for display exclusively on the Microsoft Store's product page **must** display embedded rating information, where required, in accordance with the appropriate rating authority’s guidelines.