YouTube's automatic captions are now available on over a billion videos. The feature is far from perfect, but it does make a lot of content more accessible to those with hearing impairments. Google announced the milestone on Thursday.
Auto-captions are also useful in cases where someone is trying to view content without turning the sound on, such as on mobile devices.
Captions were added to YouTube, the world's top video site, in 2006 and they became automated in 2009.
Users view videos with automatic captions enabled 15 million times per day.