It looks like I get a reprieve from having to make the video and you get a reprieve from having to install the windows subsystem for Linux.
When I first started using Joplin only the Linux client could import folders. The windows app did not. I have since learned today that the windows client can now import folders too. so, never mind.
From the docs:
Joplin import_export
you can either import a single file or a directory that contains multiple ENEX files.
If you import a single file, a notebook with the same name will be created, and all notes will be imported in this notebook.
If you import a directory, Joplin will create a notebook per file and import the notes into them.