<View>1.播放网络视频</View>
<view >
 <video style="width: 100%;height=400px;margin:1px;" src="http://wxsnsdy.tc.qq.com/105/20210/snsdyvideodownload?filekey=30280201010421301f0201690402534804102ca905ce620b1241b726bc41dcff44e00204012882540400&bizid=1023&hy=SH&fileparam=302c020101042530230204136ffd93020457e3c4ff02024ef202031e8d7f02030f42400204045a320a0201000400" binderror="videoErrorCallback"></video>
</view>
<View>2.播放本地视频</View>
<view style="display: flex;flex-direction: column;">
 <video style="width: 100%;height=400px;margin:1px;" src="{{src}}"></video>
 <view class="btn-area">
 <button bindtap="bindButtonTap">打开本地视频</button>
 </view>
</view>

Page({
 data: {
  src: ''
 },
 /**
  * 打开本地视频
  */
 bindButtonTap: function() {
  var that = this
  //拍摄视频或从手机相册中选视频
  wx.chooseVideo({
   //album 从相册选视频，camera 使用相机拍摄，默认为：['album', 'camera']
   sourceType: ['album', 'camera'],
   //拍摄视频最长拍摄时间，单位秒。最长支持60秒
   maxDuration: 60,
   //前置或者后置摄像头，默认为前后都有，即：['front', 'back']
   camera: ['front','back'],
   //接口调用成功，返回视频文件的临时文件路径，详见返回参数说明
   success: function(res) {
    console.log(res.tempFilePaths[0])
    that.setData({
     src: res.tempFilePaths[0]
    })
   }
  })
 },
 /**
  * 当发生错误时触发error事件，event.detail = {errMsg: 'something wrong'}
  */
 videoErrorCallback: function(e) {
  console.log('视频错误信息:')
  console.log(e.detail.errMsg)
 }
})

<view class="page-body">
  <view class="page-section tc">
    <video 
      id="myVideo" 
      src="http://wxsnsdy.tc.qq.com/105/20210/snsdyvideodownload?filekey=30280201010421301f0201690402534804102ca905ce620b1241b726bc41dcff44e00204012882540400&bizid=1023&hy=SH&fileparam=302c020101042530230204136ffd93020457e3c4ff02024ef202031e8d7f02030f42400204045a320a0201000400" 
      binderror="videoErrorCallback" 
      danmu-list="{{danmuList}}" 
      enable-danmu 
      danmu-btn 
      show-center-play-btn='{{false}}' 
      show-play-btn="{{true}}" 
      controls
      picture-in-picture-mode="{{['push', 'pop']}}"
      bindenterpictureinpicture='bindVideoEnterPictureInPicture'
      bindleavepictureinpicture='bindVideoLeavePictureInPicture'
    ></video>
    <view style="margin: 30rpx auto" class="weui-label">弹幕内容</view>
    <input bindblur="bindInputBlur" class="weui-input" type="text" placeholder="在此处输入弹幕内容" />
    <button style="margin: 30rpx auto"  bindtap="bindSendDanmu" class="page-body-button" type="primary" formType="submit">发送弹幕</button>
    <navigator style="margin: 30rpx auto"  url="picture-in-picture" hover-class="other-navigator-hover">
      <button type="primary" class="page-body-button" bindtap="bindPlayVideo">小窗模式</button>
    </navigator>
  </view>
</view>

function getRandomColor() {
  const rgb = []
  for (let i = 0; i < 3; ++i) {
    let color = Math.floor(Math.random() * 256).toString(16)
    color = color.length === 1 ? '0' + color : color
    rgb.push(color)
  }
  return '#' + rgb.join('')
}
Page({
  onShareAppMessage() {
    return {
      title: 'video',
      path: 'page/component/pages/video/video'
    }
  },
  onReady() {
    this.videoContext = wx.createVideoContext('myVideo')
  },
  onHide() {
  },
  inputValue: '',
  data: {
    src: '',
    danmuList:
    [{
      text: '第 1s 出现的弹幕',
      color: '#ff0000',
      time: 1
    }, {
      text: '第 3s 出现的弹幕',
      color: '#ff00ff',
      time: 3
    }],
  },
  bindInputBlur(e) {
    this.inputValue = e.detail.value
  },
  bindButtonTap() {
    const that = this
    wx.chooseVideo({
      sourceType: ['album', 'camera'],
      maxDuration: 60,
      camera: ['front', 'back'],
      success(res) {
        that.setData({
          src: res.tempFilePath
        })
      }
    })
  },
  bindVideoEnterPictureInPicture() {
    console.log('进入小窗模式')
  },
  bindVideoLeavePictureInPicture() {
    console.log('退出小窗模式')
  },
  bindPlayVideo() {
    console.log('1')
    this.videoContext.play()
  },
  bindSendDanmu() {
    this.videoContext.sendDanmu({
      text: this.inputValue,
      color: getRandomColor()
    })
  },
  videoErrorCallback(e) {
    console.log('视频错误信息:')
    console.log(e.detail.errMsg)
  }
})