Note: Only one closed caption file can be uploaded per video block. In order to add additional closed captions for different languages, separate campaigns will need to be created for each language. Another option is to host the video on an external video site, such as YouTube, Vimeo, etc. These sites support multiple closed caption files in different languages. You can then use the URL option for the video block to embed the external video directly into your campaign and provide access to the additional closed caption languages.

1. Sign in to Studio.
2. Create a new campaign, select a Video block. Hover over the block and click the pencil Edit icon.
   
   
   
   
3. Upload a video file such as MP4 or MOV. Or, edit an existing video campaign that was created from a video file. Studio cannot be used to add captions to videos pulled in via link, such as Youtube, Vimeo, or Kaltura link.
   
   
   
   
4. After the video is done processing, select Upload Captions.
   
   
   
   
5. Select a valid closed caption file in SRT or VTT format. The file must contain timestamps for every subtitle. The captions can be in any language that can be encoded in UTF-8.
6. Once the captions have been uploaded, you can preview the video to confirm that they have lined up correctly with the visuals. You can also view the captions in the Captions box. 
   
   
   
   
7. Click the Apply button to return to the Compose page.

You can remove captions from a video by selecting Remove Captions. The video will process again to remove the closed captioning. Once complete, you can upload new captions or publish the block without captions.