Camtasia (Windows): Captions Not Showing in Produced Video

Problem

Video captions are not appearing on the video when it's played back.

Solution

This can occur if you double-click the MP4 file and do not double-click the HTML file. Captions can only be shown when starting the video via the HTML. 

Once the video is playing, clicking CC on the controller to the right of the play button will enable the captions to be displayed.