For this series I'm keeping the videos short, but there's 14 of them you can watch back to back if you like! I've written a chapter number in the description of each video to show where good breakpoints are for people who want to binge, so episodes 1-6 are chapter 1, 7-14 are chapter 2, etc.
There's a text file with instructions in the same folder all the savegames are in, but short version: Find the game in steam, right click and go to manage -> browse local files, then go into media_soviet/save. You should see all your savegames there, unzip the one you downloaded and add it there too and it should show up in the load game menu