Make a Double CD/DVD Case From a Single Sheet of Paper

There are instructions in various places for folding a CD "sleeve" from an ordinary sheet of paper, including https://www.instructables.com/id/How-to-make-origami-CD-sleeve-or-what-to-do-if-you/

This works great, and I've done it several times, but I ended up needing a case for TWO CDs (well, DVDs, actually), and I didn't like any of the versions I could find for double-CD holders, so I developed this rather simple modification.