Caleb Maupin is a self-proclaimed communist and former member of the Workers World Party who believes in "Socialism with American Characteristics" - a system which in practice would resemble Britain in the 1970s. In SwAC, important parts of the economy (natural resource extraction, heavy industry) would be planned and state-controlled, large infrastructure projects would be carried out, and new welfare programs introduced. The consumer goods sector would be left to the market. Billionaires would be allowed and even encouraged.
His other activities include founding a left-wing(?) think tank which consists of six links to videos on his channel, giving lectures on his opinions, and having lots of debates with right-wingers and left-wingers alike.
I don't take him seriously. He doesn't seem to have a coherent understanding of socialism or Marx. He holds to the most superficial interpretation of the theory of the productive forces possible. He's tone deaf and not particularly good at messaging. All of that said, I wouldn't consider him a nazbol, but that doesn't have to be true for me to consider him a detriment to the left.