是否支持富文本中视频导出，目前视频导出为空。

[dch1314]

Describe the bug A clear and concise description of what the bug is.

HTML content:

Some html content to reproduce the issue

Expected behavior A clear and concise description of what you expected to happen.

Screenshots If applicable, add screenshots to help explain your problem.

poi-tl-ext version: [e.g. 0.3.12]

poi-tl version: [e.g. 1.9.1]

Additional context Add any other context about the problem here.

[draco1023]

不支持，一方面word文档并不适宜查看视频，仅能以嵌入对象的方式外部打开，另一方面html中的视频除非是直接提供文件地址的，否则并不容易下载。