.js-video {
  margin-left: 3%;
  margin-right: 3%;
  height: 0;
  padding-top: 25px;
  padding-bottom: 67.5%;
  margin-bottom: 10px;
  position: relative;
  overflow: hidden;
}
 
.js-video.widescreen {
  padding-bottom: 56.34%;
}

.js-video embed, .js-video iframe, .js-video object, .js-video video {
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  position: absolute;
}