vue 使用mysql数据库获取视频路径后，页面视频加载出错问题

我是一名vue初学者，最近在学习连接MySQL数据库时，发现视频路径能从数据库中提取出来，但是视频却无法加载出来。我也找了半天路径的问题，但是总是找不到关键的点。贴出代码和页面请大家帮我找找问题，谢谢

vue页面部分：

<template>
    <div>
      <el-container>
        <el-aside width="900px">
          <video ref="videoPlayer" class="video-js vjs-default-skin vjs-big-play-centered">
            <source :src="sp" type="video/mp4">
          </video>
        </el-aside>
        <el-container>
          <el-header>视频列表</el-header>
          <el-main >
          </el-main>
        </el-container>
      </el-container>
    </div>
</template>

<script>
import 'video.js/dist/video-js.css';
import videojs from 'video.js';
import Vue from 'vue'

import axios from 'axios';
Vue.prototype.$http = axios

export default {
    name: "VideoPlayer",

    data () {
        return {
            videoOptions: {
                playbackRates: [0.5, 1.0, 1.5, 2.0], 
                autoplay: false, 
                controls: true, 
                preload: 'auto', 
                muted: false, 
                loop: false, 
                language: 'zh-CN',
                width: "900px",
                height: "500px",
                notSupportedMessage: '此视频暂无法播放，请稍后再试' ,
                controlBar: {
                  timeDivider: true,
                  durationDisplay: true,
                  remainingTimeDisplay: true,
                  fullscreenToggle: true  
                }
            },
            shipin:'',
            sp:[]
        }
    },

    methods: {
        
        async selsp() { 
        var shipin = this.shipin;
        await this.$http.post('api/user/selsp', {
          shipin:shipin,
          }).then(res => {
            this.sp = res.data;
          }).catch(err => {
            console.log(err)
          })
        },
    },

    mounted() {
        this.player = videojs(this.$refs.videoPlayer, this.videoOptions, function onPlayerReady() {
            console.log('onPlayerReady', this);
        });
    },

    beforeUnmount() {
        if (this.player) {
            this.player.dispose()
        }
    },

    created() {
      this.selsp()
    },
        
}
</script>

<style>
  .el-header, .el-footer {
    background-color: #B3C0D1;
    color: #333;
    text-align: center;
    line-height: 60px;
  }
  
  
  .el-main {
    color: #333;
    text-align: center;
    line-height: 60px;
  }
  
</style>

连接数据库部分：

var models = require('../db/db');
var express = require('express');
var router = express.Router();
var mysql = require('mysql');
var $sql = require('../db/sqlMap');

// 连接数据库
var conn = mysql.createConnection(models.mysql);

conn.connect();
var jsonWrite = function(res, ret) {
    if(typeof ret === 'undefined') {
        res.json({
            code: '1',
            msg: '操作失败'
        });
    } else {
        res.json(ret);
    }
};


router.post('/selsp', (req, res) => {
  var sql = $sql.user.sel2;
  var params = req.body;
  console.log(params);
  conn.query(sql, function(err, result) {
      if (err) {
          console.log(err);
      }
      if (result) {
          jsonWrite(res, result);
      }
  })
});
router.get('/selsp', (req, res) => {
  res.send('retrunJson');
});


module.exports = router;

数据库：

实际页面：