/* Lazy load of video's */
            .youtube { width: 100%; }
            .video_hack { margin: 0px 0px 57% 0px; }
            .fit_video {
                position: relative;
                padding-bottom: 56.25%; /* 16/9 ratio */
                height: 0;
                overflow: hidden;
            }

            .fit_video iframe {
                position: absolute;
                top: 0;
                left: 0;
                width: 100%;
                height: 100%;
            }
            @-moz-document url-prefix() { 
                .youtube .thumb {
                    top: -16% !important;
                }
            }