html5 css3 背景視頻循環播放代碼

<div style ="position: absolute; z-index: -1; top: 0px; left: 0px; bottom: 0px; right: 0px; overflow: hidden; background-size: cover; background-color: transparent; background-repeat: no-repeat; background-position: 50% 50%; background-image: none;">
    <video style="margin: auto; position: absolute; z-index: -1; top: 50%; left: 50%; transform: translate(-50%, -50%); visibility: visible; opacity: 1; width: 100%; height: auto;" autoplay="autoplay" loop="loop" poster="{{media url="wysiwyg/landding-carburetor/head-bgi.png"}}" muted="">        <source src="{{view url=videos/test-video.mp4}}" type="video/mp4" />    </video></div>