Well in her defense she's a Community Manager with no direct link to developement, who's put on the spot to do several things at once, live, with an audience of several thousand right then and who knows how many off of later videos. I can imagine that being stressful enough to make some of the mistakes she made.
On the whole the people most shrewd about the game are likely so hideous in appearance, and so bumbeling in their speech and explanations that they'd be even worse promotion for the game, even if they did play perfectly and won all the games handily.