Nothing beats this.
A lot of the more famous poketubers are black because black culture is very mainstream and appeals to masses of children that make up most of YouTube's population. Black poketubers are good at overreacting and yelling really loudly which is entertaining to them, hence why the get so many subscribers and earn popularity. TheKingNappy isn't black, but he kind of acts like it which is a pretty good example. There are ways to grab people's attention without acting like this but this is generally the easiest way to do it..