.embed-responsive {
    display: block;
    height: 0;
    overflow: hidden;
    padding: 0;
    position: relative;
}

.embed-responsive-16by9 {
    padding-bottom: 56.25%;
}

.embed-responsive .embed-responsive-item, .embed-responsive embed, .embed-responsive iframe, .embed-responsive object, .embed-responsive video {
    border: 0 none;
    bottom: 0;
    height: 100%;
    left: 0;
    position: absolute;
    top: 0;
    width: 100%;
}