直接上代码，赶快解决问题去吧：

<video 
	id="myvideo2" 
	src='https://peacebird-img.oss-cn-shanghai.aliyuncs.com/wx/2019-12-11-bar-12.mp4'
	controls>
</video>

<view class="box">
  <text wx:if="{{!item.play}}" bindtap="videoPlay">△</text>
</view>

  videoPlay() {   //播放视频
     let videoplay = wx.createVideoContext('myvideo2', this)
     videoplay.play();
   }

视频正常播放，这里查了太多资料终于解决了，记得wx.createVideoContext(‘myvideo2’, this)，记得加this,记得加this,记得加this,说三遍。