Provide text or audio descriptions of important video content. This lesson takes approximately 25 minutes to complete. For those who are deaf or hard of hearing, audio content is not accessible. Videos without descriptions are not accessible to the blind. In both cases, the information needs to be provided in an alternative format.
Important information contained in audio or video also needs to be available in text.
These alternative formats and captions are also used frequently by those who have hardware or environment limitations. For example, the captions on a video can be selected when the audio would be distracting to others in the area. Some multimedia players allow for additional tracks to accommodate additional languages. Techniques for Multimedia . The following techniques and examples support Checkpoint 4 from the IBM Checklist for Web Accessibility .