Every video on uploaded to MacVideo will be automatically machine captioned. By default, captions are not turned on or displayed on the video. If you want to see the captions, click on the CC button at the bottom of the video player on the right hand side and select English. Your custom caption settings will be saved in your browser cookies. So once the captions for that video are turned on, they will remain on when you revisit the video. If you clear your browser cookies regularly or have specific ones disabled, the settings will not be remembered.