.iframe-container{
    position: relative;
    overflow: hidden;
    background-color: black;
}

.iframe-16-9 {
    padding-bottom: calc((9/16) * 100%);
}

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