Probably because A) Your video kinda seems like the asker was a plant to give Podesta a chance to chimp out and play the victim (maybe not, but seems like that), but more importantly B) A dude in the background talkling about the emails, being semi-drowned out by the rest of the crowd and the interviewer and your own voice, is easier to ignore than a man directly asking you in person if you are a pedophile and you having to respond directly to that rather than ignore it.