CSS play button for videos

playButton.css

.playButton {
  background-color: #888;
  border-radius: 30px;
  display: inline-block;
  height: 60px;
  left: 50%;
	position: absolute;
  margin-left: -30px;
  top: 120px;
  width: 60px;
}

.playButton:after{
  border-color: transparent transparent transparent white;
  border-style: solid;
  border-width: 17px 0 17px 28px;
  content: "";
  display: block;
  left: 20px;
  margin: 0 auto;
  position: absolute;
  top: 13px;
}