AVON has added audio descriptions to some videos and will continue to add more. Audio-Described videos have added narration that describes on-screen images for the benefit of those with visual impairments.
If you run across a video that does not already have audio description, let us know at asklibrary.com.edu. It generally takes a couple of weeks.
To find videos in Academic Video Online with audio descriptions, try searching: "with audio description".