Cosplay vs. Diet Coke a take on "diet" products running our lives

So there's this girl on youtube who's into this game called Kingdom Hearts which is an anime game. Quick sum up about the game it's basically about in epic journey of one dude trying to find his friends and save his world. So this is the episode that shows how if these charaters were in our world and this episode is about the main charater Sora is trying to find classic coke. His journey is documented by his roomate Nicole. These videos basically are combining a Japanese oriented game with American culture. Poking fun at how here in the U.S. we all try to resort to "diet" products to loose weight instead of drinking the original. If anything they are mostly taking about how different their world and our world would be. Not only that throughout the whole video she tends to emphasize how everyone was looking at her funnly. As far as the audience goes most people would enjoy it but those who drink these all the time and don't stick to "classic" versions of these. Side note is that the person playing Sora is a girl, not a boy despite the fact that Sora is a boy. Which leaves us to wonder if we did go about our lives in a cosplay M.O. how would we been seen, and would we look at things the same way?
Part 1: https://www.youtube.com/watch?v=r0RIQ2ccRvY&NR=1&feature=endscreen
Part 2: https://www.youtube.com/watch?v=mOvozPdO2GY