video进度条加载，视频不播放是怎么回事？

手机型号：iPhone XS

微信版本：7.0.12

代码：<video custom-cache="{{false}}" bindtimeupdate="bindtimeupdate" bindpause="bindpause" bindplay="bindplay" src="{{shuju.url}}" poster="{{shuju.picPath}}" bindfullscreenchange="fd" bindended="end" autoplay="true" show-casting-button="true"></video>