I guess I do like Tomoko because she's an idealized awkward loser like myself, but I'd disagree with him when he says that she's totally without redeeming traits as a person. Being a bumbling, awkward loser is, in itself, kind of endearing to me. Maybe it's different for me because high school was just a few years ago, but there's something so... me about a person who sits quietly in the corner, hiding behind a book, screen or headphones whenever there's the threat of a social encounter, or hides in the bathroom to get away from a potentially awkward encounter, or plans escape routes from a restaurant to avoid being seen by somebody, or is shattered inside when a friend reveals that they've succeeded at exactly the thing that I've failed horribly at for months.
Somebody that behaves like me probably shares a similar mindset to me. It's the reason that my best friend is a self-proclaimed loser manchild like myself. We find reassurance in eachother's faults. When one of us catches the other making loud, stupid noises in the break room just to amuse ourselves, it's a shared experience we can laugh about rather than clamming up and being ashamed. Granted, we're not exactly as incompetent as Kuroki Tomoko. But then, nobody's an action hero like Goku or an adorable schoolgirl like Konata, either. Most fiction is about exaggeration to various effect.
To use the conclusion from the video, I'd rather be friends with Tomoko. I feel like Tomoko would understand if she caught me making stupid noises at 1 AM to amuse myself. Yuu probably wouldn't.