🚜 Add support for exporting to PyVideo

[jefftriplett]

I noticed PyVideo hasn't published any videos for DjangoCon US since 2019 or Europe since 2021. https://pyvideo.org/search.html?q=djangocon

In theory, we should be able to use our PyDantic models to add schema support for https://github.com/pyvideo/data

For schema details, see: https://github.com/pyvideo/data/blob/main/.schemas/video.json

For an example of what the JSON file needs to look like, see: https://github.com/pyvideo/data/blob/main/djangocon-us-2019/videos/djangocon-2019-your-web-framework-needs-you-an-update-by-carlton-gibson.json