Streaming video now must provide subtitles for the hearing impaired. There’s no guarantee of accuracy, though. One solution: crowdsourcing.
Imagine sitting down to watch an episode of Game of Thrones—and hardly being able to understand anything. That’s the case for non-native English speakers or any of the 36 million deaf or hard-of-hearing Americans. HBO doesn’t expect its viewers to have a knowledge of High Valyrian; that’s why it takes care to offer subtitles to viewers understand exactly how Daenerys intends to free the slaves of Essos.