I did make a tutorial that covers SCAR, but it assumes you have learned how to program.
https://www.youtube.com/watch?v=RnNdGDXOvbQ
As for the .win questions:
1. I don't remember if the name matters too much, but I have always matched it to my .mod and .xml files, so I would recommend that to be safe.
2. scar_file has to be set to
Code
. This is how your scripts get loaded when your WCP is selected."data:scar/winconditions/<name of your scar file here>.scar"
The tools have honestly not changed enough to warrant new videos (plus I'm not as active anymore), so they should still be fairly accurate. Keep in mind most of my videos assume you have some modding experience. I am glad you found the official wiki, as that is definitely at more of a beginner level than most of my videos. It's hard teaching stuff.