Too bad we don't have an example of this to look at. I, regretfully, agree with the OP. It would probably seem kind of weird, and then male presenter would seem more than a bit childish.
Have you seen girls playing with kids? Would you say it's “over the top” when some of them act in a similar way doing so? When a girl plays with a kid in such a way, does it “reinforce some gender stereotype”?
What KeyFrame said. Even if the video were intended to be viewed by children, her body language and behaviour would still be a bit over the top, and as it is,the intended audience is people donating to Kickstarter. So yeah, I think it reinforces gender stereotypes. Which, I mean, I'm unsure if it's a good or a bad thing, but, well, shrug.
