Bismillah
First of all I just want to tell you that, why do you argue on youtube? I used to do it, still do, but it is pointless, you're probably never going to get through their thick skulls, Allah guides whomever he wills, and Allah misguides whomever he wills, and none other than Allah can change that.
"Your answers are childish, illogical, irrational, incoherent in complete non-sequitur and pathetic as perhaps, perhaps, perhaps... thinking that all those involved were stupid or crazy and thinking that the delusion of Muhammad was the best explanation! It is comical!"
Notice how he just dodges any of your arguments (if you had any)? This is how most people who argue about Islam on the internet stall for time, they usually don't back up claims with evidence, even if they do, they just link to the entire page, and just say: "Oh look at this" when the arguments on the website are so stupid and then you ask to provide evidence FROM the website, which they refuse to do, and tell you to look it up yourself, and when you do, you just see that the website is full of bull, don't waste you time with this guy, he is not worth your time.