/* responsive iframe*/
.youtube-iframe-container {
  overflow: hidden;
  /* 16:9 aspect ratio */
  padding-top: 56.25%;
  position: relative;
}

.youtube-iframe-container  iframe {
   border: 0;
   height: 100%;
   left: 0;
   position: absolute;
   top: 0;
   width: 100%;
}