I have no knowledge of Anon being anti-vaccine. If I were to formulate a hypothesis, I would imagine that they view 'vaccines' as synonymous with big health. So, "the big healthcare mafia is selling us 99-percenters vaccines at a huge markup, profiteering from their proprietary knowledge, state-protected monopoly, and our dependency."

Then again, Anonymous doesn't exactly have a unified message. It's possible that the individual creator of this video has their own conspiracy theories about vaccinations.