You can set Apple TV to show special accessible captions so those who are deaf or hard of hearing can fully enjoy new TV episodes and thousands of movies. Just look for the CC or SDH icon when you’re browsing in the Apple TV app.
Note: Not all videos include closed captions.
Go to Settings select Edit Styles to create a new style based on your choice of:
Font, size, and color
Background color and opacity
Text opacity, edge style, and highlight
Note: If you connect a Braille display to Apple TV, it will continuously print captions and subtitles of a TV show or movie when captions or subtitles are turned on.