[Feature]: 新增视频（含音频）导出课程

[chhfbluesky2017]

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

[wbjkf]

非常需要。