.video-wrapper {
  position: relative;
  padding-bottom: 55%;
  padding-top: 15px;
  height: 0;	    
  overflow: hidden;
  margin:0 0 20px 0;
}

.video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}