preview.html

                <silentbox-single src="" autoplay="true" description="custom message"></silentbox-single>

                <silentbox-group>
                    <silentbox-item src="https://www.youtube.com/watch?v=MUNFT3_UX00" autoplay="true" description="My very custom message">video 1</silentbox-item>
                    <silentbox-item src="https://www.youtube.com/watch?v=DuOwqBxKfIo">video 2</silentbox-item>
                    <silentbox-item src="http://mjtrends-672530.c.cdn77.org/images/blog/2014/11/latex-fashion-design-up-and-coming-desingers2.jpg">video 3</silentbox-item>
                </silentbox-group>