> But I DO know that removing videos from YouTube won't make it better. It may make it worse.
I think you're right, and I have some first-hand knowledge on the matter. I've debated QAnon types and flat earthers alike. In both cases, they often see an absence of information as some overarching conspiracy. I'm not really sure who is worse (the flat earthers are a subset of a broader "government-is-hiding-things" conspiracy), but they both follow a cult-like structure in that if you disagree with them, you're not "one of us" and are either not smart enough to understand the implications of their beliefs or are willfully blind to their "truth." I doubt YT would ever remove QAnon or flat earth videos, but if they did, I suspect the fallout would be far worse than just leaving them alone. In some cases, it's helpful to cite their own predictions (and have something to cite) to dismantle their argument! Admittedly, this isn't useful in direct debate, because they're forever moving the goalpost, but it can be helpful for illustrating deficiencies to third parties that might be sympathetic to their views but are still open to the idea that there are problems with the opposition's argument[1].
Now, I say this as a conservative with some libertarian leanings. I don't like censorship, and I think it's harmful to shield people from ideas they don't like. However, I think moderation within a community is incredibly important to its survival provided it is applied equally. Nothing is worse for reasonable discourse than having someone jump in and start slinging pejoratives, insults, and abuse for no other reason than they don't like what you've said. As an example, I've personally had someone stalk my admittedly limited social media presence across various sites in order to post screenshots "proving" some inane belief they had about me supporting some ridiculous conspiracy. They then repeatedly posted insults and diatribes across numerous unrelated comments until I blocked them. That type of behavior should be an immediate--and permanent--ban.
[1] We might be passed this point, because the number of undecided people with regards to any particular conspiracy (for or against) is diminishing. I used to think the flat earth groups were largely trolling, but I've spoken with some people who have encountered them in real life or have friends who have been duped into believing the conspiracy. I also know a small handful of people who believe QAnon. No amount of evidence is going to sway either party. And no, I don't know what the best solution is other than to continue engaging where appropriate and banning where there's abuse.