Video
With video, accessibility starts with the script. It’s helpful to imagine that you are writing a radio script. Then, any action will have to be thought about in terms of speech or sounds. This will make creating the transcript very simple.
Think about the Hitchhiker's Guide to the Galaxy. It started as a radio show, and then a book, then became visual. For each change in media, the message is available to everyone.
Captions
At the very least video needs captions (subtitles are for foreign languages!)
Kapwing — Where Content Creation Happens (opens in a new tab)
Descript (opens in a new tab)| (opens in a new tab) Create podcasts, videos, and transcripts (opens in a new tab)
Audio description
Ideally, audio description should be added. If there is significant action in the video that is not explained by people speaking, audio description has a narrator saying what’s happening.
Here’s a great example: 
The Interviewer - Captions (opens in a new tab)& (opens in a new tab) Audio Description (opens in a new tab)
Transcript
Add a transcript of the video, for people who want to
- read the content quickly
- make notes
- read on a Braille machine
Discussion
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