By that video's definition, I'm a geek, with traces of nerdism: IQ and obsession. Always have been. There are several sci-fi properties I've studied out pretty thoroughly. For decades, my friends referred to me in terms like "the trivia guy" because I just read and retained so much. The funny thing, though, is that I took a geek test several years ago (I think it was on website "Major Geek"?) and I only scored 38%. There's some truly serious geeks out there apparently. I'm also not a...I'd guess you'd call it a "pan-geek". I've met people who are obsessed with everything pop culture, and my mind just reels at the amount of time needed to get to that level. There are large chunks of such culture I have no interest in. Anime and manga, for example, although I was a fan of the early stuff brought to the State back in late 1970s: Robotech, Starblazers/Spaceship Yamato, etc.
Curiously, my geekdom does not dramatically play out in CoH. I'd probably suggest I'm a well-informed casual player. But when I read people studying the finite details of a crafted set and how it works better for one specific controller over another, my eyeballs roll back and I risk falling asleep. It's probably the math involved. I scored reasonably well in math entering college, but other than geometry, I've never had an interest in it.