How To Add Closed Captions To A YouTube Video
Default Close Captions (CC) On For Videos Uploaded To YouTube
Your can default the Close Captions (CC) to "on" for your uploaded YouTube videos. This video does not display the captions by default. But, there are captions for the video. To default the CC's on. Open the YouTube Creator Studio for that video. Add the tag "yt:cc=on" to the tags for the video. Save the changes. Now go back to the video player. The CC will now default to "on" even after the page is refreshed.