.mediaplayer-wrapper.video {
    position: relative;
    display: block;
    width: 100%;
    padding: 0;
    overflow: hidden;
}

.mediaplayer-wrapper.video:before {
    display: block;
    content: "";
    padding-top: 56.25%;
}

.mediaplayer-wrapper.video iframe {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}