1) To import in WordPress, they’ll need one of the following plugins which translate the video URLs into embed codes with the JSON meta information per the spec here: http://oembed.com/
Plug-ins:
https://wordpress.org/plugins/wistia-wordpress-oembed-plugin/ (tested)
https://wordpress.org/plugins/oembed-provider/ (untested but should still work)
If you need further assistance or have questions on any of the information presented here, please feel free to reach out to our Customer Success Team HERE.