.videoWrapper {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 */
    padding-top: 25px;
    height: 0;
}
.videoWrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    min-height: 700px; 
}

.large_bkg { background-color: #1b1b1b!important; }
.b_button { background-color: #a1bea0!important; }
.b_button:hover { background-color: #bfd9be!important; }