As Jezebel notes, the video could understandably be viewed to be in violation of the site’s community guidelines. But it’s key to note that Facebook’s community guidelines are influenced by the community. The site itself can’t monitor each of the billions and billions of posts that circulate on Facebook directly; instead, it has to rely on community response — and therein lies the problem:
The issue is not that Facebook employs some fuddy duddy set of Druid anti-sex elders who wring their hands over each and every thing that gets posted on it’s billion or so user pages. That’s actually not the case at all. The issue is that sites such as Facebook rely on community policing, meaning they pretty much only take action such as this when enough people click the “report” button on posts, photos, videos, etc. If you’ve ever wondered why so many photos of women showing their mastectomy scars or mothers breastfeeding got banned in the blink of an eye but shitty pages that actually promoted prostitution took FOREVER to get removed look no further than that as your answer. - Salon
It's funny how something like this will be removed from Facebook lickety-splick, but when you report a profile or page promoting pornography, paedophilia and other sexually explicit content (of an exploitative or degrading nature) then the response you get from Facebook is that it does not violate community standards. I don't know about what you think, but that doesn't make much sense to me.
The (scary) truth is that there is a whole lot of sex in peoples' secret minds - it seems to be becoming more open now, but not in a way where people are exploring their sexual expressions, more in a way where people are exploring their sexual fantasies which are often based on distorted thoughts that became more and more twisted over time. You have probably wondered why pop stars are losing more and more clothing and becoming more provocative, ignoring parents' calls for modesty. Sexuality is now an industry - it's not about self expression but about creating fantasies that very often simply cannot be fulfilled. Think about it, how often is "the real thing" as good as how you imagined it would be.
Sex is an industry that sells fantasies. You can't touch them or fulfill them. They are more likely to lead you further down the rabbit hole of unrealistic expectations and desires. They are also more likely to make things like pornography and exploiting young girls acceptable - more so than sexual education.
The claim that pornography is healthy is an illusion, just like the product that pornography is actually selling. The sex that is portrayed in mainstream porn is not self expression - it is exploitation and it warps the way that people think sex is supposed to be. A very clear example of what happens is shown in the movie Don Jon, as well as the very similar fantasy that is sold to (mostly) women in mainstream media of "what your life should look like".