Missing alternatives to 'What Is ARIA Even For?' video
This is listing all the missing important bits that help people with access needs understand the video better. This is ignoring the many little visual and auditory jokes which won't be essential to understand the video (but are still excluding people).
Missing alternatives to meaningful visuals
These things should be in an audio description, or a transcript in addition to what's in the captions. (Not the things in square brackets, those are just explaining the context.) When words appear like that on the screen, they are prepended with a '>'.)