That's irrelevant, that's about parents controlling what they kids can or cannot watch on family devices. I would not want my kids to watch any content with swearing. Inserting that footage was probably unnecessary for the purpose of that documentary at first place.
The fact that some youtuber gets less money from ads because one of his video was flagged as inappropriate is a non story.
I personally despise youtubers who fill their otherwise potentially interesting videos with cheap memes.