.responsive-slides, .responsive-video {
        position: relative;
        padding-bottom: calc(56.25% + 36px); /* 16:9 Ratio plus toolbar */
        height: 0;
        overflow: hidden;
}

.responsive-slides-4-3, .responsive-video-4-3 {
        padding-bottom: calc(75% + 36px); /* 4:3 Ratio plus toolbar */
}

.responsive-slides iframe, .responsive-video iframe {
        border: 0;
        position: absolute;
        top: 0;
        left: 0;
        width: 100% !important;
        height: 100% !important;
}