*big sigh*
As a frequent consumer of the genre, I've learned the best way to avoid doing something illegal is to stick with viewing via platforms that are confirmed legal and regulated. If the actress doesn't have some sort of profile on the IAFD I'm leery. There are verifiable companies that produce fake amateur style content for those that prefer that style, and you're generally safe from accidentally stumbling onto something that's going to get you on a registry.
It's bad enough the performers only get paid the day of filming, and receive no royalties from the subsequent sale of the videos. Tack on pornhub probably is a bigger DMCA headache than youtube, I think the free part of the site is just a bad idea altogether, for creators (sans the performers & companies that now contract their content with Pornhub).
One good thing I've noticed in modern pornography is that the creators utilizing platforms like Onlyfans (et al...) are better at policing the "hub" sites and sending takedown notices than the major studios. Say what you will about the quality of DIY porn careers, it is damn near impossible to find bootlegged versions of a good number of the creators and good for them for taking control.
Child sex trafficking is unforgivable to me and in 2020 there has got to be a tech way to reverse track the source of illegal videos popping up on the "hub" sites. And frankly, it takes a sick fuck to just carry out the crime from the start, much less escalating it to uploading on such a public platform. I feel bad for the one victim interviewed, videos she was forced to film as a child, she's worried will affect her adult professional life. So not only do we have, as a culture, sex shaming legal consenting adults for porn careers, we have to worry about VICTIMS being shamed too!? Not very encouraging for people needing to reach out for help.
In my limited circle of friends in real life and the internet that work in various forms of "sex work" they're the biggest advocates for stopping child & adult sex trafficking. On the most basic level, that trafficking exists, puts a stink on their very legal and consenting professions, getting lumped in unfairly by an uneducated public. I don't know what exactly the major studios could do as far as social advocacy goes, obviously no one wants a PSA prefacing their "alone time" but the less illegal stuff there is, the more legitimacy can be gleaned from the public eye on their work.