What a terrible example of a straw man argument. It's not even legitimate. He made a strawman argument to disprove these questions as strawman arguments.
So according to this guy, everyone deserves to die unless they believe what he believes, slavery is ok as long as it isn't biased by anything dubbed PC by modern culture, and that we're not good (even though it says that everything God created was good in Genesis).
Some of these questions are kind of weak. They try to present themselves as bigger than they are. Some of them are kind of like "chicken or the egg" type questions, that while they may provide thought provoking discussion, they're essentially meaningless.
Of course the makers of the original vid and this kids response don't really want answers from anyone. They both already think they have them.
The Brit's response was pretty good, but anyone who is basing their entire worldview off the christian bible probably will think his problem is he doesn't believe every word of the Bible is literal truth.