.container.video {
    background: black;
}

.video {
    margin: 4em auto 2em;
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    text-align: center;
}

.video iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    max-height: 788px;
    max-width: 1400px;
    margin: auto;
    background-color: black;
}