.resp-frame-wrapper {
    position: relative;
    overflow: hidden;
    padding-top: 56.25%; /* (height 9 ÷ width 16) because this is the default ratio for YouTube videos */
}

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

.featured-image #badge-foto-archivio {
    background: #000;
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 2px 0;
    opacity: 0.5;
    cursor: default;
    text-align: center;
    color: #FFF;
    font-size: 12px;
}

.featured-image #badge-foto-archivio.didascalia-foto {
    font-size: 14px;
    background: rgba(0, 0, 0, 0.70);
    opacity: 1;
    font-weight: bold;
    padding: 5px;
}