Euphony Pro: Featured videos

I've noticed that the featured video section is not working in the customizer anymore (even after updating the theme to the latest version). In the customizer under "Theme options > Featured video" I can only enable/disable this section but can't edit the video-information (adding, deleting, editing). Same goes for "Featured Content" and "Featured Slider". I use Chrome and the latest Wordpress version. Can anyone help or give me a hint where to look?