Including captions in videos is a mandate in some areas of the world so we highly recommend having captions on for your videos. So to add captions to any videos you have hosted through Youtube or Vimeo, follow the tutorials linked below:
Note: This is a setting that needs to be changed/activated from the respective sources that you have selected as this is a hosting third-party to Tutor LMS. For further help, please contact your video hosting provider.