Random episode 1: Food needs me and I need food.

So…I don’t think this will be a continued series but

ANYONE, PLEASE HELP ME OUT.

QUESTION: What traditional snack is this and can anyone tell me where I can get it in Korea (preferably Seoul)?

If this seems familiar, this was actually taken from Sungkyunkwan Scandal Episode 8, somewhere in the middle of the show:)

Credits to Yunasmith25 for the video (subbed eppy 8). 

—

*Hopes for a reply and will appreciate the help greatly*