You can generate or upload caption files to your video or audio files in Canvas Studio. The most common file type is an SRT file, though Studio also supports VTT files, which are more user-friendly for mobile devices.
If you need help creating a captioned file, you can use a captioning site such as Amara to easily create captions for your video or audio files.
Note: You cannot add closed caption files in Canvas Studio to media that is uploaded from Youtube.
Open the Canvas feature area that displays the video or audio file you want to view.