[data-component=video] .video-16-9 {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 */
  height: 0;
}
[data-component=video] .video-16-9 iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}