Bulgogi Hot Pot has many names in Korean. Bulgogi Jeongol (불고기 전골), Yaetnal Bulgogi (옛날불고기), and Bulgogi Ttukbaegi (불고기뚝배기). They all basically refer to the same thing: bulgogi, vegetables and glass noodles that are cooked in broth right at the table or that comes boiling hot in a stone pot.
Use my bulgogi recipe to marinate bulgogi in advance. I had some frozen uncooked bulgogi from before so I just defrosted them here. If you don't have time, you can just make fresh bulgogi and let it marinate while you are waiting for the noodles in step 3.
Make Kelp broth by adding kelp to 2 1/2 cup warm water for 30 min or more.