.fitVids-wrapper {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
}
.fitVids-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}
/** From  https://css-tricks.com/fluid-width-video/
**/