.video-container {
    position: relative;
    padding-bottom: 100%;
    padding-top: 30px; height: 0; overflow: hidden;
    }

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