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.
Agreed. I watch vids on YT, myself, but I was referring to self-limiting exposure, as you pointed out. There's a lot more out there than just cute kitten vids. For example, tons of documentaries, spiritual videos, how-to vids on dyi projects, that kind of stuff is great. But thank you for defining confirmation bias. I'd heard it before, but never really zeroed in on its meaning.