I feel like the only even remotely acceptable way to do this is to show the ad, prompt for the answer for 10 seconds. They can log the right/wrong answer or if the time expires the lack of one and must move on.

I can imagine metrics knowing if your advertising is actually reaching people is valid. But to make people answer and especially make them watch more if they answer wrong is about as dystopian as it gets.

If (and I say if, I really don't want to believe it is) that is the case, the only correct response is to uninstall Hulu immediately and put on your pirate hat.