The written recipe with photos and tips is here:
I’m sharing my family’s all-time favorite food with you today, chicken noodle soup — dak-kalguksu in Korean. The word kal means knife and guksu means noodle soup, indicating that the noodles in this soup are made by cutting them from the dough.
There are many kinds of kalguksu, but this version is made with chicken (dak in Korean). The noodles are made from scratch, which makes this dish very special and welcome in any home.