CSS to display a full width video that maintains at 16:9 ratio

FullWidthVideo.css

.video-container {
  position: relative;
  padding-bottom: 56.25%; /*16:9*/
  padding-top: 30px; 
  height: 0; 
  overflow: hidden;
}
 
.video-container iframe,
.video-container object,
.video-container embed {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}