Video Captions - Information For This Demo
Quick tip: Auto-captioning is getting much better, but don't depend on it.
Even when captions are provided for video content, it is a good practice to provide a text version of the video content in addition to the video version. The text version should include all dialog along with text descriptions of any meaningful visual elements and sound effects. Also, any text version should include appropriate structural elements expected in an accessible text document, including headings, alt text for images, and so on.
How to test this issue
- Test technique: Watch, Listen, and Read.
- You must watch a video and compare the captions with the dialog. There is no tool that will automatically test the captions.
- Listen to the dialog and compare with the caption. Confirm the following:
- The dialog matches the caption text.
- The captions are synchronized with the dialog. (You read the captions at roughly the same time the dialog is heard.
- Watch the video for any meaningful visual information that is not described by the video's dialog. Confirm the following:
- An audio description is provided to describe the visual information for people who cannot see it.
- In this case, an alternate version may be provided. For example, another copy of the video with an alternate soundtrack containing audio descriptions might be provided.
- For audio-only content such as an audio podcast, verify that a text version is also provided containing the same content. The text version must include document structural elements such as headings, as appropriate to the content.
- For video-only content that has no soundtrack or no spoken dialog, a text version must be provided that describes any meaningful content seen visually in the video.
Failing WCAG Guidelines and Test Tips
For audio and video content, the following WCAG guidelines apply:
- 1.2.1: Prerecorded Audio and Video
- 1.2.2: Captions
- 1.2.3: Audio Description or Media Alternative