.youtube-container {
  display: block;
  margin: 10px auto 25px;
  width: 100%;
  max-width: 600px;
}

.youtube-player {
  display: block;
  width: 100%;
  padding-bottom: 56.25%;
  overflow: hidden;
  position: relative;
  width: 100%;
  height: 100%;
  cursor: pointer;
  display: block;
}

img.youtube-thumb {
  bottom: 0;
  display: block;
  left: 0;
  margin: auto;
  max-width: 100%;
  width: 100%;
  position: absolute;
  right: 0;
  top: 0;
  height: auto;
}

div.play-button {
  height: 72px;
  width: 72px;
  left: 50%;
  top: 50%;
  margin-left: -36px;
  margin-top: -36px;
  position: absolute;
  background: url("http://i.imgur.com/TxzC70f.png") no-repeat;
}

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