Wait, Hetalia Was Flagged As Innapropropriate On YouTube?

I was checking out YouTube to see if I could find the first episode to show my friends. After a bit of digging, I found some search results that looked good: "Hetalia: Axis Powers, Episdoe One." When I clicked on the result, I got saying some of the content was Innapropriate, flagged by other viewers, and I needed to prove my age to watch it. Really? Of all the other videos, and this one was flagged?? O_o