How does all this work? Is it like King of Fighters or some shit but with Disney?
It starts out as the main character Emma Swan (who is an original character) + Snow White and Prince Charming vs. The Evil Queen. Emma gave up her son for adoption, he was adopted by The Evil
Queen Mayor, who lives in the real world now with a town full of other fantasy characters that have all forgotten who they really are. The son tracks down his birth mother and brings her back to town to save everyone, hijinks ensue. The first season is pretty much that, but in Season 2 & 3, the plot goes all over the place and Peter Pan, Captain Hook, Robin Hood, Ariel, The Wicked Witch of the West, Mulan, and well, I assume you saw the video.