Activate Close Caption by Default

Hello. Is there a way to activate automatically the close caption at the beginning of the course? I mean, without the need of pressing the CC button.

Maybe change a parameter in the frame.xml inside the story_content when the course is published.

 <option name="sidebar_enabled" value="true">
 <options>
 <option name="sidebarpos" value="left" />
 <option name="closed" value="true" />
 </options>
 </option>

 <option name="closed_captions" value="true">
 <options>
 <option name="font" value="Open Sans" />
 </options>
 </option>

Thank you,

Cesar