.media-block iframe.media-oembed-content {
    height:286px;
}
@media (max-width:575px) {
    .media-block iframe.media-oembed-content {
        height:calc(0.56 * (100vw - 30px));
    }
}
@media (min-width:767px) and (max-width:991px){
    .media-block iframe.media-oembed-content {
        height:388px;
    }
}
@media (min-width:992px) and (max-width:1199px){
    .media-block iframe.media-oembed-content {
        height:236px;
    }
}