The importance of accessible video
The Americans with Disabilities Act (ADA) is a federal anti-discrimination statute designed to ensure equal access to opportunities and benefits for qualified individuals with disabilities. In many state, government and education institutions, videos must include ADA compliant captions. Nationwide uses WCAG 2.1 AA as a conformance guideline. According to this guideline, we need to provide closed captions to videos. Transcript can be used as a minimum alternative if closed caption file is not available.
In order to be fully accessible to the maximum number of users, web multimedia should include both synchronized captions and a descriptive transcript.
According to WCAG 2.1 Guideline 1.2