#mainContainer {
  position: relative;
  width: 640px;
  height: 360px;
}

#content,
#adContainer {
  position: absolute;
  top: 0px;
  left: 0px;
  width: 640px;
  height: 360px;
}

#contentElement {
  width: 640px;
  height: 360px;
  overflow: hidden;
}

#playButton {
  margin-top: 10px;
  vertical-align: top;
  width: 100px;
  height: 36px;
  padding: 0 16px;
  font-size: 14px;
  font-weight: 600;
  color: white;
  text-align: center;
  background: #2c3e50;
  border: 0;
  border-radius: 6px;
  cursor: pointer;
}