.videoiframe {
        overflow: hidden;
    }

    .tab-pane .videoiframe>div {
        max-width: 100%;
        position: relative;
        padding-bottom: 56.25%;
        height: 0 !important;
    }

    .tab-pane .videoiframe>div iframe,
    .tab-pane .videoiframe iframe,
    .tab-pane .videoiframe>div div,
    .tab-pane .videoiframe>div video,
    .tab-pane .videoiframe video {
        position: absolute !important;
        top: 0;
        left: 0;
        width: 100% !important;
        height: 100% !important;
    }

    @media (max-width:350px) {
        .nav>li>a {
            padding: 10px;
        }
    }