Throughout the rest of the video he described the postmodernist ideology he's criticizing as:

-Valuing Ne: He says postmodernists believe that there are an infinite interpretations any phenomena/object could have and that it's ultimately relative.

-Not valuing Fe: After believing that there are an infinite interpretations they believe that all of them are equally unworthy (Fe objective value judgment is unvalued, survival needs are ignored, each individual can form their own meaning because in the large scheme of things they are all equally unimportant)

-Not valuing Ti: Postmodernists explicitly reject logic because they view it as a set of rules defined by the oppressors to manipulate us into continuing to oppress the oppressed.

-Valuing Fi and aristocratic: the bit at 19:18 about power and hierarchies.

-Association with identity politics: we know Fi is identity.

-Association with the modern cultural/progressive radical left like radical feminists, extreme trans rights activists, Antifa, etc.: we know why those are xNFP already.