主要代码如下：

      <el-table-column align="center" label="视频url">
        <template slot-scope="scope">
          <el-button type="primary" @click="playVideo(scope.row)" ref="btn" size="mini"> 
          播 放
          </el-button>
        </template>
      </el-table-column>

      <el-dialog title :visible.sync="dialogPlay" width="30%" @close="closeDialog">
         <video :src="videoUrl" controls autoplay class="video" :ref="dialogVideo" 
         width="100%"></video>
      </el-dialog>
      

mounted() {
    this.$refs.btn.onclik(function() {
      if (this.$refs.dialogVideo.paused) {
        this.$refs.dialogVideo.play();
      } else {
        this.$refs.dialogVideo.pause();
      }
    });
},
methods:{
// 视频播放
    playVideo(row) {
      this.dialogPlay = true;
      this.videoUrl = row.videoUrl;
    },
}
closeDialog() {
    this.videoUrl = ""; //清空数据 关闭视频播放
},