.pfy-responsive-iframe-container {
    position: relative;
    overflow: hidden;
    padding-top: 70%;
    margin: 0 auto 3% auto;
    max-width: 486px;
}
.pfy-responsive-iframe-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}