1.2.1 Audio only and Video only (Prerecorded)
Provide alternatives for time-based media.

About

The use of audio and video clips in a website can enrich the content and render communication more effective for the visitors; however, providing a text equivalent is important for disabled users and is also beneficial to those in a noisy environment.

In case of video clips, audio description of the video may be provided in place of text. This makes it possible for users with and without vision impairment to review content with equal ease. Care should be taken to synchronize the alternatives with the actions taking place on the screen.

Audio clips MUST be accompanied with captions for the benefit of hearing impaired or those who do not have access to audio. Captions must not only include dialogue, but identify who is speaking and include speech information conveyed through sound, including meaningful sound effects.

Example:

Before Rectification

Before Rectification

After Rectification

After Rectification