Import a Takeout of Photos? I have an iCloud account for my iPhone.   My computer is Linux.  I have in hand a Google Takeout of about 600 photos.  How can I import them into iCloud?  I would like to preserve the metadata that is now in [photo].jpg.json files.

There are also a handful of videos.  Importing those too "would be nice."
It seems you can join your JPEG files with JSON in bulk with exiftool.

See examples here:
https://stackoverflow.com/questions/42024255/bulk-join-json-with-jpg-from-google-takeout