Just being a reasonably attractive girl who is also intelligent and technically inclined would make one stand out. Showing off the goods like that is unnecessary and while I like to gawk as much as the next guy, I think it distracts from the topic being discussed and likely attracts a lot of people who are just gawking. When I see someone who is dressed like a booth babe, my subconscious assumption is that that's essentially what they are, I end up surprised when they turn out to be knowledgeable. I mean whatever, she's free to dress any way she likes, it's not my intent to judge, but it's hardly surprising when the focus ends up being her appearance rather than the technical aspects of the video.