.ytframe {
    position: relative;
    padding-bottom: 56.25%;
    padding-top: 0;
    height: 0;
    overflow: hidden;
}

.ytframe iframe,
.ytframe object,
.ytframe embed {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}