.video-wrapper {
    position: relative;
    display: block;
    height: 0;
    padding: 0;
    overflow: hidden;
    padding-bottom: 56.25%;
  }
  .video-wrapper > iframe {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
  }