Some of the stuff he's saying is a bit inaccurate (Black businessmen) but I can see why he has his opinions.
Maybe it's just "grass is greener" syndrome but there's more scope and opportunities for a Black man to succeed in the US meanwhile there is a glass ceiling on how successful one can be in the UK.
There is also a bigger feel of community and staying on code amongst Black Americans while that isn't really the case here. There is not really much UNITY in Black British community because it's so fractured and people either rep their home countries more than being Black British or straight up want nothing to do with Blackness.
Generally, the UK is just a shyt place to thrive as a Black person unless you're lucky but it's also somewhat better compared to how Black people are treated in France, Italy and other European countries.