> I've spoken to people like this moderator and they just ramble over any topic they get excited about.
Sure, me too, and they're generally consistent in that between genders. This guy isn't. And people like him are very common too.
> What specifically makes you think he rambled because she was a woman?
By watching the entire video and comparing him to his conduct with the other panelists interviewed. She also wasn't the only non-native speaker, so it's not that either.
Respectfully, I disagree. I am also not convinced that his motivations really matter, in the end he demonstrated that it's okay to let the men speak but not the one woman. In my mind, this is what really matters.
What specifically makes you think he rambled because she was a woman?