Using Youtube URL In Customize Header Media Area Plays Video But No Sound

When I first added the url and clicked save in the customize header media area, the video played with sound. once i closed the customize menu, and it refreshed the main page, the sound was no longer working. Any ideas on how to resolve this?

Hi,

The video header option comes from WP core and they made it so that it plays without sound. We have this article here to help you enable it with some code (for self hosted videos, not for Youtube videos): http://docs.athemes.com/article/68-unmute-video-header