Twitter’s closed caption switch is now available for iOS and Android users Twitter’s closed caption switch now helps iOS and Android users see captions while playing a video in the app. “The choice is yours: the closed caption switch is now available for everyone on iOS and Android! Tap the “CC” button on videos with closed captions enabled to turn closed captions off/on,” the Support Twitter post reads. The microblogging site recently announced that the subtitle toggle button for its video player is now available to everyone on iOS and Android, The Verge reports. A button that appears in the upper right corner of a video if it has subtitles available allows you to choose whether you want to see written descriptions. Last April, Twitter confirmed that it had begun testing a “CC” button that provides text captions for every video posted on the platform, but it would only be available to a limited number of iPhone users.