That was an interesting and theatrical play through from the feller at Guns Nerds and Steel and certainly introduced The Wasteland to the gaming community.
Unfortunately those files are a little out of date now, and won't really show The Wasteland in the best light or reflect updates since then.
Here are some instructions to download the essentials, jubylives.
1. Go here for The Wasteland Mod
https://www.nexusmods.com/7daystodie/mods/1043?tab=files
and download Version 21.2.2.52
2. In addition to The Wasteland Mod, are 4 other Mods that allow it to function appropriately.
a) These are Full Auto Launcher:
https://www.nexusmods.com/7daystodie/mods/2062?tab=files
and download Version 1.2.3
b) NPC Mod - 0-XNPCCore
https://github.com/7D2D/A21Mods/blob/main/0-XNPCCore.zip
and click on the downward pointing arrow that looks like it has a tray underneath it on the far right side. When your mouse touches it, you will see Download raw file. Click it and it will start downloading it.
Don't follow the one that is prompted on the Nexus Mod page as it takes you to an unzipped location without a download option. It used to work but no longer.
c) Random Mainmenu Background
https://www.nexusmods.com/7daystodie/mods/2120/?tab=files
and download Version 1.03
d) NPC Mod - 0-Score
https://gitlab.com/sphereii/SphereII-Mods/-/archive/master/SphereII-Mods-master.zip?path=0-SCore
Clicking on this link will automatically download it.
Don't follow the one that is prompted on the Nexus Mod page as it takes you to an unzipped location without a download option. It used to work but no longer.
I think those instructions are correct.
The contents of your Mods folder should look similar to this:
As for a World to play on. You can generate your own using the in game Random World Generator or use one which has been provided here by Bdubyah.
https://dev.azure.com/bdubyah/_git/Mods-A21?path=/Wasteland_Maps
Go to the right side of one of the entries and it'll show three dots lined up vertically. Clicking on that will allow a download option to appear.
An alternative 8K World guaranteed to have each and every The Wasteland POI can be found here:
https://www.moddb.com/games/7-days-to-die/addons/wasteland8k01
That should cover all of the things you need. If it's wrong, others will put you right.