Allow HTML5 Video Autoplay on iPhone

For example:

CSS:

         .article-video  {
             position:absolute;
             z-index:5;
             overflow:hidden;
             width:768px;
             padding:0px;
             margin-top:0px;
            margin-right: 100px;
       }

         .article-video video {
            height:432px;
           width:768px;
      }

HTML: 

      <div class="article-start-bg">
           <div class="article-video">
	          <video src="video/myVideo.mp4" preload webkit-playsinline></video>
           </div>
      </div>