.embed-container {

    position: relative;

    padding-bottom: 56.25%;

    height: 0;

    overflow: hidden;

}

.embed-container iframe {

    position: absolute;

    top:0;

    left: 0;

    width: 100%;

    height: 100%;

}

.embed-containerchat {

    position: relative;

    padding-bottom: 56.25%;

    height: 500px;

    overflow: hidden;

}

.embed-containerchat iframe {

    position: absolute;

    top:0;

    left: 0;

    width: 100%;

    height: 100%;

}