Depending on the platform or regions where your video will be released, closed captions might be mandatory.
Broadcasters, cable companies, and satellite television service providers must provide closed captioning for 100% of all new, non-exempt, English language video programming. Closed captioning must also be provided for televised emergency information in some locations. These closed captioning requirements are enforced by the Federal Communications Commission (FCC) under the authority of the Communications Act. For more detail information, please refer to National Association of the Deaf’s website.