Speaking as someone who delves VERY deeply into the nerdy realm, I think what you do is very important. I remember the early days of open source software. The very mention of the idea that people might make things easier to use for the end user would result in flames talking about how real Linux users don't care about end users, they care about what other computer competent people can do with a little bit of reading and time in the terminal.
That is the absolute shittiest way to support anything. Fortunately a number of groups sprung up that felt differently, Ubuntu among them. They felt that user experience was important in getting more people interested in Linux. They were right.
Among these groups there were many talented programmers who were interested and involved in making a decent user experience. Unfortunately it's hard to find that kind of passion when it comes to documentation, which was part of what had been lacking.
Then people like yourself showed up and started making quick little how-tos for this feature or that feature. The documentation improved. The ease of use improved. Regardless of what anyone says, if you never ever even scratch the surface of the terminal, what you do is vital to FOSS in general.
As much as the jackholes who tore you down at the convention like to think they're on a high horse because they're nerdier than you and the troggs who leave comments on your YouTube page about your boobies, they're actually not that different.
If someone can watch your video and the only content they get out of it is, "Holy shit! What a great rack!" Then clearly they haven't really absorbed anything you've said.
Then some jackhole watches your viedo, also notices your nice rack (and what a wonderful rack it is, btw ;) ), and notices all the comments and requests for moar bewbies below. At this point they have absorbed just as much from your video as the troggs they believe themselves to be above.
Clearly these "high and mighty defenders of FOSS" are as unhelpful, and actively damaging to FOSS as the jackholes I encountered on a regular basis in the early years. I cannot wait for their departure from the FOSS scene. I would rather have 1 of you backing FOSS than 10 of them.
What you do is important. Wear what makes you feel good. (Also, wtf? A dress is not politically correct?) Talk about the bits and pieces of FOSS that you know/are passionate about. Keep on keepin' on with the videos.