.mmtmwrap,.mmtmwrap_l{
    width:100%;
    position:relative;
    display:flex;
    flex-direction: row;
}

.mmtmwrapper{
    margin-bottom:20px;
}

.video-container {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 ratio */
    height: 0;
    overflow: hidden;
    max-width: 100%;
}

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