There is (according to the video) concrete evidence for both acute toxicity as well as causal carcinogenic effects when it comes to PFOA.

The distinction here is between lpng-chained Fluoropolymers like Teflon, which are completely benign as far as evidence suggests; and fluoroalkyl acids (like PFOA), that are short-chained, can enter the bloodstream, and mimic the structure of fatty acids thus being able to bond to stuff in our body.