Is this what people here have meant by saying "PC Culture"?

I ran across some videos that were talking about the phenomenon of PC culture and it reminded me of some of the discussions I’d seen here—and some that I’d stepped into, I guess without really understanding what people had been meaning. The videos also brought up and described the term “regressive left,” which sounded vaguely familiar to me… I think I might’ve heard it first mentioned here.

Both videos cover a fair amount of conceptual ground, much of it the particular perspectives of the speakers, so I’m not saying that these videos universally represent certain positions (although I would be curious about where they differ, if they differ, and to what extent)... But they gave some rather stark positions that frankly surprised me, because they were so outside my own experiences of anything I had thought was the so-called “PC” of today, and I was left thinking about… well, many things that aren’t strictly relevant to detailing my question here, and also about who it was I thought I had been talking about and who it was that others had been talking about when we talked about “PC”-ness.

Videos:
https://www.youtube.com/watch?v=eJQHakkViPo (11 minutes)
https://www.youtube.com/watch?v=v1gil0pCsLE (26 minutes)

Admittedly, I don’t know much about the show. The first appeared for an unrelated reason in my queue—i.e., Stephen Fry—and the second followed because it was the same channel as the first.

But, my basic question—what one or more of the speakers mention, is this what people have been referring to with “PC Culture” and related frustrations with the left?

I’m interested in the definitions and specific groups/subgroups people are referring to, so if you don’t have the time or patience to watch the videos (I recommend 1.5 speed, btw) you can just define it in your own way here. But I am sort of curious how people would respond to the videos, too.

(And please keep it civil everyone!)