I first learned about those from randomly watching a YouTube video about Korean street foods. This video, actually. It has a lot of "oddly satisfying" qualities. However, no English captions, so my husband and I also had fun trying to figure out exactly what they were making and what the ingredients were. {= ) For instance, the grassy-looking substance in the first bit. Not sure if that's a sort of green onion, or maybe sea grass? It shows up again in a later segment featuring a woman running a soup shop, who happens to remind us of my mother-in-law.
Anyway, I ended up Googling "Korean corn dog," since that's what it looks like to an American, and thus learned about the astonishing deep-fried cheese and/or meat on a stick dipped in batter and rolled in potato. It sounds amazing, and also like an instant heart attack. ^_^
What seems to be a dessert that looks like a giant waffle filled with whipped cream and perhaps chocolate, too. I dunno how you even approach the eating of one of those!
I think we correctly identified the fancy mochi, at least...
~Neshomeh