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 Creator Studio.
2. Click Create.
   
   
   
   
3. Select Video from the simple block menu. (For an overview of all campaign creation options, please refer to Create a New Campaign.)
   
   
   
4. Hover over the block and click the Edit icon.
   
   
   
   
5. On the Content panel, click Add a video to upload a video file such as MP4 or MOV. Or, edit an existing video campaign that was created from a video file. Creator Studio cannot be used to add captions to videos pulled in via link, such as Youtube, Vimeo, or Kaltura link.
   
   
   
   
6. After the video is done processing, select + Add Captions.
   
   
   
   
7. Click Add Captions File to 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.
   
   
   
   Note: For caption files in VTT format, do not remove the WEBVTT header at the top of the .txt file prior to uploading. This will make the file unusable.
   
   
8. Once the captions have successfully uploaded, click Save.
   
   
   
   
9. Once the captions have been uploaded, you can preview the video to confirm that they have lined up correctly with the visuals. 
   
   
10. You can remove captions from a video by selecting the Trash icon. Or to replace the captions with new captions, click the Gear icon.