修改此文件 这部分代码，增加为以下内容
上面的 地址videofreeadmin.youyacao.com 是自己的后台域名地址

  /** 添加视频
     * Notes: <br>
     * User:bigniu <br>
     * Date:2019-12-07 <br>
     * Time:17:38:52 <br>
     * @return Json <br>
     * @throws \think\db\exception\DataNotFoundException
     * @throws \think\db\exception\ModelNotFoundException
     * @throws \think\exception\DbException
     */
    public function addVideo()
    {
        $uid = input("uid/i",1);
        $title = input("title");//标题
        $url = input("url");//视频链接
        $type = input("type");//视频类型
        $img = input('img');//通过视频存储路径获取视略缩图"1.png";//
        $user = Db("user")->where(['id'=>$uid])->find();
        if(!$user){
            return error("该用户不存在，请重新选择");
        }

        $typeInfo = Db("type")->where(['id' => $type, "level" => 2])->find();
        if (!$typeInfo) {
            u_log("用户" . $user['name'] . "(" . $user['id'] . ")发布视频失败('类型选择错误')", "error");
            return error("类型选择错误");
        }
        $data = [
            "title" => $title,
            "uid" => $user['id'],
            "type" => $type,//视频分类
            "img" => $img,
            "url" => $url,
            "state" => 1,
            "create_time" => TIME
        ];
        $id = Db("video")->insertGetId($data);
        $data['id'] = $id;
        u_log("用户" . $user['name'] . "(" . $user['id'] . ")发布视频成功");
        return success("成功", $data);
    }

最终效果是