<div>
<iframe src="https://www.youtube.com/embed/tAdg4vW5abc?ecver=1&controls=0&showinfo=0&rel=0&autoplay=1&loop=1&mute=1" frameborder="0" allowfullscreen style="position: absolute;
  background: #000;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  z-index: -99;
  pointer-events: none;
  width: 100%;
  height: 100%;"></iframe>
  <!-- 注意 Youtube embed 連結是置放在 src=" 和 ? 之間。
       ? 之後的程式碼是控制像是自動播放,迴圈,和靜音設定:autoplay=1, loop=1, mute=1 -->
</div>

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