.embed-video-container {
    position: relative;
    padding-bottom: 56.25%; /* 16/9 ratio */
    padding-top: 2px; /* IE6 workaround*/
    height: 0;
    overflow: hidden;
    margin-top: 0px;
    margin-bottom: 10px;
}

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