Not sure I'd ever be so sure of something I'd change the font to 1.
I would say it's arguable whether or not it's porn. I know what porn used to be. A scripted, fictional story with short scenarios in which there were sex acts performed. It's true that over time with the internet, specialty groups and fetish people formed ranks, but I always thought of Porn Hub and other places like that as the heir apparent to old style porn.
To me, this isn't porn because while the actions of the participants seem scripted, they all still act of their own free will. Their is no direction coming from anyone in real time.