Of course I don't. Still it's sad to see that you are OK with sexist behaviour.
I watched a bunch of the video. The guy is a poor moderator. Using this term creates a charged bias on the reader, who almost certainly hasn't seen the video: It labels the moderator's behaviour as purposefully sexist and paints a clear picture of something that is actually really, really hard to read.
On top of this, what if you're wrong? What if this is a genuine mistake (which it honestly appears to be -- watch his reaction to the audience member saying 'let her speak')? Put yourself in his shoes: You make a mistake that has nothing to do with gender and you're now painted by hordes of headline-readers as the ambassador to all things sexism. Are you okay with this?
There's actual, serious problems of sexism and gender bias in STEM. Cherry-picking situations where socially awkward people were disrespectful to someone else who happens to be a woman isn't just pointless, it's actively harmful to feminist causes.
Situations like this don't have to be purposeful, conscious, and malicious to problematic. In fact the reason sexism is so hard to fight is that it is usually unconscious habit. The power of default.
It's not an issue of cherry picking; this sort of thing happens all the time. It's only by calling dramatic attention to it that people can start to change. No one changes their habits easily. It takes motivation and a lot of reminding.
This is not useful. It doesn't "fight sexism", it makes the battle harder to fight because you end up fighting an enemy that doesn't exist. You're moving the goal posts.
And I am 100% for fighting "unconscious biases", but my point is this isn't even necessarily that.
Please read some of the comments here. Please read Veronika Hubeny's reply. None of the people who were actually involved in this think it has to do with sexism/gender. Great, a woman stood up for another woman, an awkward moderator was humbled, and we all learned and felt a little better at the end of the day. Now, by turning this into a sexism issue, trying to claim that the moderator was "mansplaining" without even bothering to figure out whether it is conscious or not, not only are you drawing a new dragon to fight against, but you're subjecting a moderator to potential bullying and harassment.
None of this is motivating. It's pretty dreadful in fact, and the idea that you might be subjecting an innocent to this sort of treatment is turning people off the cause -- in fact, it's far likelier to make them even more cautious and tread even more carefully when talking about it (which through continued self-censorship ends up turning the entire community into an echo chamber).
Please focus on the real dragons. Changing people's views and behaviour takes focus and patience. Look at the environmentalism and lgbt movements: They're fighting for issues that the majority of people aren't (directly) affected by, but they're winning because, the majority of the time, they use other people's compassion to fight real issues.
Here instead, you're taking something we've all been guilty of in our life (talking too long and over someone else) and turning the person into an enemy because it might have had something to do with gender. Do you realize how horrifying that is?