Closed-captioning is available for any video that has been originally captioned by the service the video has been pulled from.
When you assign your video lesson, you can select the option to "Turn on CCs" to enable closed-captioning.
When a student watches a video lesson which has closed-captioning, a “CC” button will appear. Click the button to enable/disable the subtitles.
Enabling subtitles in different languages
Some videos may be subtitled in different languages. To go through the options, click the “CC” button.
No captions available
If the video doesn't have any available subtitles, the "CC" button won't appear at the bottom of the video.