I must say, that video made my inner pedant go "NO NO THAT ISN'T RIGHT" a whole bunch. But I'm not about to record an embarrassing response video over it.
There is a line in YouTube videos that I have noticed. Once your videos involve anything to do with other peoples on YouTube in a negative way, you've imploded your account upon itself, blotting out the rest of the universe. Exempt from this, seemingly, are those who take turns actually entertaining one another for happy making.