Tools

Assistive technologies -- Visual/textual interpretation -- Audio description

Resources

This webpage from the University of Washington describes a variety of ways for making video content accessible. "An accessible video includes captions, a transcript, and audio description and is delivered in an accessible media player." The webpage includes list of resources for captioning and audio description, including paid services,...
This tip sheet from the National Center for Accessible Media provides guidelines for creating accessible video content. It covers the topics of captioning, writing narrative descriptions, and choosing an accessible media player. The tip sheet also offers links to additional resources for creating captions and audio descriptions.
YouDescribe is a service developed by the Smith-Kettlewell Video Description and Development Center that allows users to add audio description to YouTube videos. Users can browse through recently added descriptions or search for a video by YouTube URL. If a video has not been described yet, users can add it to a Wish List or add a description.