They say x, ask for where they heard about x. They say from y news organization, ask the source for y. If they say z, if z is actually an actual document or otherwise, ask them where in z does y claim x is true.
If z is just another news organization, keep going until they provide (or don't provide) an actual document. If they can't procure an actual document, send it yourself. If z is just another video cIip, ask them for the whole video. Provide them the entire video if they can't.
Do not try to antagonize. Just simply ask the questions as if you were trying to understand their point of view, to learn something we might not have heard.
Ah ya some good arguments my man. The only thing I would add is he has to tow a few lines to keep engagement. For instance I wouldn't look at it as advocating or pushing vaccines when he clearly gave alternatives etc. He has a fine line he needs to try and maintain. That's just my perspective not saying it's right. But it is a much more critical or nuanced way to think imo.