CSS for responsive Youtube videos

youtube.css

/* youtube integration */
.ce_youtube {
    position: relative;
    padding-bottom: 56.25%;
    width: 100%;
    height: auto;
}
 
.ce_youtube iframe {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    width: 100% !important;
    height: 100% !important;
}