In lieu of personnel auditing captions, an automated way for viewers to submit alerts or issues is by adding a QR code that shows on pause.
Create a method for viewers to report captioning opportunities. Hire personnel to review content to ensure captioning parity with audio.
Empower the content manager to ensure all new media being supplied contains accurate captioning before distribution.
Re upload content with subtitles. If possible, notate existing content to promote new subtitled content.
Empower the content manager to ensure all new media being supplied contains accurate subtitles before distribution.
If having subtitles on all video content is deemed distracting, consider creating a secondary channel specifically dedicated to subtitles.
Additionally, if you're distributing content on platform(s) that do not support Closed Captioning, perhaps consider using your massive influence to help wield positive change.