Audio descriptions describe what is happening on the screen to help users with visual and cognitive disabilities understand the visual content. To comply with WCAG AA, all internet videos with audio need an audio description.
Resources
https://www.w3.org/WAI/media/av
Captions, Transcripts, and Audio Descriptions
(WebAIM)
This article provides an overview of the value of captions, transcripts, and audio descriptions and how they make media accessible. Special note: don’t skip over the short example that is in the audio descriptions section.
Easy Way to Create Accessible Videos with Audio (approx. 4 minute video)
(Pope Tech)
This video walks through the steps you can take to create captions, audio descriptions, and transcripts for your videos.
How to Make Videos and Audio Accessible
(Pope Tech)
This article explains how to make audio and video content accessible. It includes audio-only (i.e. podcasts), video only, and video with audio. It also includes a brief note about color contrast and flashes in video.
How to Create Audio Descriptions for Accessible YouTube Videos
(Pope Tech)
This article explains two methods you can use to include audio descriptions with your videos. It also includes considerations you need to take into account when creating audio descriptions for existing videos.
A Complete Guide for Adding Captions to YouTube Videos
(Pope Tech)
This article explains how to add captions to YouTube videos. It also includes tips for writing good captions and some guidance if you are considering using a 3rd party captioning service.
The Complete Guide to Captioned Videos
(Meryl Evans)
Evans was born profoundly deaf, so has first-hand insight about the importance of captions. My favorite parts of this article are the 10 Guidelines to Create Great Captioned Videos and the Special Caption Topics sections. Also, if you are looking for captioning software options, there’s a list of them included in this article.