视频是用html5的video标签放的
<div class="media"> <video autoplay="" loop="" id="videos"> <source src="http://stg.shinetech.likvm.com/sites/stg/files/video/Shinetech-Final_Compress.ogv"> <source src="http://stg.shinetech.likvm.com/sites/stg/files/video/Shinetech-Final_Compress.MP4"> Your browser does not support the Video tag. </video></div>解决方案
videoElem.addEventListener('canplaythrough',function(){});