He’s been on this tip for a long while, supporting Ron Paul and being anti-vax. Last Week Tonight did an episode on Vaccines, and he shows up in a no longer valid comparison of RFK Jr on the left, Alex Jones wherever he fits in, and even this guy. I remember him also calling for Ron Paul 2012, but doesn’t seem to be from this one, so hopefully I’m remembering that right.
Still, he’s been libertarian and antivax for a long time, and those communities have been heavily aimed at by fascists for recruitment.