Closed Caption Button Not Appearing By Piper Kruse Hi there! I have a closed caption SRT file attached to a 60-minute MP4 in my Storyline course, and have closed captions checked in the player. In the player preview, the closed caption button shows up. However, when I preview the file the closed caption button doesn't appear. It doesn't appear when I launch the course in our LMS either. Thank you for any help!