1var stopVideo = function ( element ) {
2    var iframe = element.querySelector( 'iframe');
3    var video = element.querySelector( 'video' );
4    if ( iframe !== null ) {
5        var iframeSrc = iframe.src;
6        iframe.src = iframeSrc;
7    }
8    if ( video !== null ) {
9        video.pause();
10    }
11};
12