.iframe-container{
    position: relative;
    padding-bottom: 56.25%;
    padding-top: 30px;
    height: 0;
    overflow: hidden;
  }
  .iframe-container iframe,
  .iframe-container object,
  .iframe-container embed{
    position: absolute;
    top:0;
    left: 0;
    width: 100%;
    height: 100%;
  }