The official launch of this feature was announced on Twitter. This support for automatic video captions is rolled out for both Android, iOS, and Twitter on the web.

Android & iOS: auto-captions will show on muted Tweet videos; keep them on when unmuted via your device’s accessibility settings Web: use the “CC” button to turn on/off pic.twitter.com/IHJAI31IvX — Twitter Support (@TwitterSupport) December 14, 2021 It means that on both Android and iOS, captions will be automatically generated when the video is on mute. for the users using Twitter on the web, captions will be made available upon clicking the “CC” button in the video player. Captions can be turned off from the same button. These automatic captions will be available in 30 languages including English, Chinese, Hindi, Spanish, Japanese, and others. Right now there are no options to translate these languages but the company might launch it in the coming days. Also, these captions will be available on the new uploads so it means they won’t be available on the previous videos. Have you received this feature? If not, wait for another couple of days. Also Read: Twitter Acquires Quill, Expect Major Overhaul to Twitter DMs