.resp-container {
    position: relative;
    overflow: hidden;
    padding-top: 47%;
}

.resp-iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.iframe {
    width: 100%;
    height: 470px;
    border: 0;
}