https://www.vice.com/en_us/article/v7mzpj/pornhub-content-deleted-verification

Before the purge that disappeared more than 75 percent of content on the platform, Pornhub hosted a lot of videos and photos that weren’t humans having sex. There were full-length movies, memes, and video game playthroughs that you might see on a non-adult site like Twitch, but there was also a ton of animation, 3D renderings, audio erotica, music videos, fanfic from furries and bronies, and stop-motion animation like LEGO minifigs fucking. 

Pornhub became a dumping ground and safe harbor for a lot of stuff, and a lot of these creators didn't necessarily want to upload a photo of themselves to a huge porn corporation's database in order to get verified. They were just throwing things on the site for fun, to share with others in their respective communities, and the wider world. Compared to a site like Milovana (an adult message board and the birthplace of Cock Hero, videos of which are mostly gone from Pornhub now) or the furry fan art forum e621, Pornhub was a way to reach a more mainstream audience. With last week’s action, a lot of that stuff is now gone.