The experience was designed and tested by Deaf and native signers.

In addition to , which tells the story of disability rights activist Judy Heumann, the film will also offer interpretation for American Sign Language (ASL) and British Sign Language (BSL). The company added that the interpretations will also be available later this year for its movies and Way of the Warrior Kid, with more Apple Original titles to follow.
Apple says that each sign language interpretation was "carefully crafted to fit and complement the Apple Original film it interprets."

As you're playing something, you can select the Sign Language option above the playback progress bar and choose from the available languages. After that, the interpreter appears in the bottom right, layered on top of the film.
In time, when more titles offer this feature, you'll be able to find them more easily through the app's search function, by using descriptive phrases like "with ASL" or "with BSL." And to aid discovery, Apple will create a collection within the TV app called "Movies & Shows with American Sign Language."