I've been on the internet for 23 years and I have never been forced to watch an anti-vaxxer's video. Your theory that by producing lots of videos they subvert lots of people is simply wrong.
It's the same fallacy as with the "Russian Bots" election conspiracy. Just because you can create lots of content, doesn't mean you can make people watch it.
It's the same fallacy as with the "Russian Bots" election conspiracy. Just because you can create lots of content, doesn't mean you can make people watch it.