Closed caption feature should be used whenever you embed video and audio into your course.
Once your video is uploaded to Arc you can request to have closed captions added. Select the Captions tab under the video file. You will then need to select the language option for the transcript and the press the request button. Once the video is transcribed you will be notified via email. Select the ‘review and publish’ button to make changes. You will then need to check the text against the audio for accuracy and make any needed edits via the rich content editor once you have selected the edit button. Once all changes have been made select the ‘publish’ button.