I'm not sure why you're summarizing what's explained in the video.

It's clear PFAS contains chemicals that are likely dangerous (like C8) and chemicals that are likely not - like Teflon. So, unless I'm misunderstanding, as an umbrella term for dangerous chemicals it's useless from the get go.

I understand the potential danger of C8 and similar acids.. it's explained in detail. But the part that's not explained is why is it in final consumer products. It seems like a chemical that only forms a step in the processes of making Teflon (and I'm guessing other similar products). Is the problem they were just dumping it into the soil at the plant? How is it getting to polar bears? (they keep talking about polar bears)