This is the classic, spicy, traditional napa cabbage kimchi called tongbaechu-kimchi, aka baechu-kimchi, or pogi-kimchi. But this dish is so common that most Koreans simply call it “kimchi.” When people talk about kimchi, this is the dish they’re referring to!
Full recipe: http://www.maangchi.com/recipe/tongbaechu-kimchi
Kimchi-making FAQ: https://www.youtube.com/watch?v=c3aZ3nBMtNU
These are the best hot pepper flakes I ever tried:
Very spicy version: https://amzn.to/2KKesIi
and medium spicy: https://amzn.to/2NR0WoI