Otaku Culture Video

I think the man explained the Otaku culture clearly, but I couldn't agree with some of them.

First it's the definition of "Otaku".
I think Otaku isn't just for animation and manga.
In Japan we say Otaku as a person who is in an expert in some kind of subject.
For example Idol Otaku, Tetsudou Otaku and Yakyuu Otaku are genres of Otaku.

Secondly, I thought "Tsundere"'s term was weird.
The maid in the video was shouting, "Die!" and I don't think that's tsun.
Tsun should be an attitude being shy, not being rude.
Also, they didn't show the "Dere" part.

Finally, the "Burikko" was completely wrong.
In the video, they said that old women do it but in my opinion, "Burikko" isn't about age.
It's about the attitude women shows to make her look cute and attractive.