답니다

Formal polite, with a storytelling warmth

Ends a statement formally but with a soft, confiding tone, as though letting the listener in on something: I spent a quarter of a century researching burgers, that's why noise cancelling is so good these days, that's how I get through the summer. It is also the fairy-tale ending, which is exactly the joke in the line about the mukbang witch becoming human and living happily ever after. Compared with plain 습니다 it sounds warmer and more narrated, which is why on-screen captions like it.

Register: formal polite, warm and narrated