If you are going to be rude to someone like that, you should provide your own evidence. Provide us links to specific points in the talk that you feel makes this episode substantial. Or show some manners.
In an open democratic society everyone is responsible for surfacing the truth as they see it. Then we all decide indepedently what is a true or false assertion based off the evidence given.
Your job here is much easier: cite anything. Their job is much harder: they have to make an assertion about the entire episode. You should try to provide something substantial. Instead, you've come off as a bully & rude, dismissed the reply out of hand & done nothing to say why. You refuse to be helpful because you've asserted that you're right & they're wrong and that's all there is to it. It should be easy for you to make a real claim, beyond 'you're wrong'.