#fooevents_zoom_embed {
    padding-top: 56.25%;
    position: relative;
    overflow: hidden;
    min-width: 960px;
    max-width: 1920px;
    min-height: 540px;
    max-height: 1920px;
}
#fooevents_zoom_embed iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}