cssAudio - Activefile-genericCSS - ActiveGeneric - ActiveHTML - ActiveImage - ActiveJS - ActiveSVG - ActiveText - Activefile-genericVideo - ActiveLovehtmlicon-new-collectionicon-personicon-teamlog-outoctocatpop-outspinnerstartv

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              <div class="movie">
    width="640" height="360" 
    webkitallowfullscreen mozallowfullscreen

              .movie {
  position: relative;

.movie:before {
  /* This will setup the aspect ratio of our screen */
  content: '';
  display: block;
  /* content-box makes sure padding adds to declared height */
  box-sizing: content-box;
  width: 100%;
  height: 0;
  /* Vertical padding is based on parent width */
  /* So we want 9/16, converted to % as our vertical padding */
  padding: 0 0 56.25%;

.movie__video {
  /* Now we need to absolutely position content */
  /* Otherwise it'll be pushed down by the :before element */
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;

/* Extra styles for prettiness */
body {
  padding: 2em;

@media (min-width: 48em) {
  .movie {
    width: 75%;
    margin: 0 auto;

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