It didn't, Celestia said that it wasn't a good idea for the Mane 5 to go with Twilight to the human world because things would get weird if they were two of them.
And human Pinkie Pie asked pony Twilight if she had a "twin sister" who lived in the human world (she's talking about Twilight's human counterpart)
So yeah, I don't think that seemed to answer my question, but that was a good video though.
No offense, but I doubt it