Yeah, 3rd video the guy has a very rigid way of thinking and doesn't seem to understand the concept of a lack of a belief. He also seems to not understand that a person could answer "I don't know" to the question "why does something exist." He also seems to misunderstand the nature of religion. Religion is not an explanation for the natural world. Well, not beyond "God did it" anyway.
And then yes, his final example was incorrect, although I can see what he's getting at. If someone only ever argues against an idea without offering anything of their own, then that's usually a sign of bad faith. Ok, poor choice of words... it's a sign they're argumentative and not actually interested in the ideas... but his analogy was very poor. For example in court the defense only has to prove a person's innocence, it doesn't have to find the murderer.
Anyway, it boils down to "that which can be asserted without evidence, can be dismissed without evidence." Theists, well the dumb ones, really struggle with this because the only thing atheists have to do is say "I don't believe that" and all the burden of proof is on the theist. For someone who has only ever assumed God exists it feels like a trick has been played on them, and they don't understand. They think the atheist should have to prove why God doesn't exist. The smart theists don't struggle with this. They understand they have the burden of proof, and after a certain amount of arguing it always boils down to "based on my experience I choose to have faith" and no one can argue with that. That's fine. Have faith.
You are actually playing it well. The advantage is white has given a huge target to chase. If you bring your queen out, then you are giving them a chance to do the same. So, I would have captured with the knight in this case. Taking with the queen is good too. You didn't lose the game because of it, but you made it slightly harder to throw a crushing blow.
On move 9, you had to retreat the knight and this doesn't really help you. You played d5, so I suspect you actually know more than you are telling us. If not, you should trade down from here to simplify a win.
In that game, 4...d5 likely wins a bishop.