Do we like Derek Muller?
Our score: 8 out of 10. A clean record on harm and a thin but decent good-person file, with real public-interest work on PFAS and nothing nasty found.
Derek Muller is the bloke behind Veritasium, one of the biggest science channels on YouTube. He did a PhD in physics education research, so he is a teacher at heart. That explains the whole style: he is more interested in why people get physics wrong than in just telling them the answer.
His early approach was to make videos for complete beginners and slowly lift the difficulty. He says viewers at both ends disliked that, so he switched to topics people commonly misunderstand. He also said he liked YouTube because it was fairer than the traditional media industry. That is a decent origin story for a bloke who built an audience by being wrong in public and fixing it.
The business changed in April 2023, when he sold part of Veritasium to Electrify Video Partners. He remains an owner, while Electrify handles hiring, production and compliance. Tubefilter reports the team now tops 30 people and subscribers are up about 50% since the deal. That is why he appears less on camera now, and why some videos won't feature him at all.
On the harm check, nothing nasty turned up: no campaigning against LGBTQ+ people or women, no conspiracy-theory slide, and no culture-war grifting in the coverage I read. What did turn up is the opposite. His nearly hour-long 2025 video on PFAS forever chemicals took on how the dangers were hidden, and he tested his own blood on camera, finding some PFAS levels well above the national average. I didn't find who he works with beyond his own production team, so that part of the check is thin.
The video landed the same day the US EPA announced rollbacks of PFAS safeguards, which Scientific American noted. He is also a Feynman fan, saying that you must not fool yourself and are the easiest person to fool. No lawsuits, convictions or allegations against him turned up in my searches. That is a short list, honestly, but a clean one.