That particular dish looks to me like Chinese hot pot, or a similar Asian hot pot (not to be confused with Lancashire hotpot, which is a kind of stew!).
The main feature of the dish is that you have a pot at your table with a burner underneath, and a number of raw ingredients which you add to the broth and pull out at your own convenience. These may include meat, root vegetables, leaf vegetables, noodles, eggs, seafood or fish.
I would argue that it's not a soup or a stew, because the components are fished out and eaten, and are the main part of the dish. You can optionally drink the broth when you are finished, and I guess you could call that part of the dish a soup (though I would say "broth" to connote the thin-ness), but the dish as a whole is just hot pot. You don't call it a stew when you boil ravioli, right? ;)
Hot pot (also known as steamboat in Singapore, Malaysia, Thailand, the Philippines and Brunei), refers to several East Asian varieties of stew, consisting of a simmering metal pot of stock at the center of the dining table. While the hot pot is kept simmering, ingredients are placed into the pot and are cooked at the table. Typical hot pot dishes include thinly sliced meat, leaf vegetables, mushrooms, wontons, egg dumplings, and seafood. Vegetables, fish and meat should be fresh. The cooked food is usually eaten with a dipping sauce. In many areas, hot pot meals are often eaten in the winter during supper time.