el-upload截取视频首帧作为上传封面图

https://blog.csdn.net/m0_56683897/article/details/132400960

https://blog.csdn.net/sinat_35626559/article/details/127734155

element的el-upload同时上传图片和视频(手动上传)：

https://blog.csdn.net/qq_42563079/article/details/135219381

elementUI使用el-upload上传文件写法总结及避坑，上传图片/视频到本地/服务器以及回显+删除：

https://blog.csdn.net/qq_23073811/article/details/126216368

关于vue2.0+Elementui实现视频上传并显示上传进度条的案例：

https://blog.csdn.net/weixin_44462984/article/details/119913999