[Feature]: 新增视频（含音频）导出课程

### Problem or Motivation

目前只能导出ppt和interactive网页，希望能新增导出视频和音频，字幕等功能

### Proposed Solution

不用录屏就可以当做视频教程来用了

### Alternatives Considered

_No response_

### Area

Classroom generation

### Additional Context

_No response_