Perhaps they could both put an 18+ rating on it along with a banner that would play before the video stating that the content of it appears to be utter rubbish. Or some other words to that effect. The sad thing is that people will ignore that. The 18+ rating would be well deserved but one cannot guarantee that the audience will have a mentality of 18+.
This raises the question of how do we teach people how and when to refer to experts in the field rather than some nutters pushing an agenda?
Teaching won't change their minds. There needs to be inherent value in what's being taught. Ideally, people take classes and learn new things because it provides some sort of use-maybe helps them get better jobs they want or they have a passion to learn. If you don't speak to their values, you can give them all the information in the world it won't work. It has to "personally" apply to that person(s) life.
So, for example, I heard an RFer (sometime a month or so ago) said he wouldn't take the vaccine because a loved one took it and had a side effect (mild but serious to the person concerned). He didn't want to take it. No matter How Much science you give this person as a smart, intelligent dude, his personal attachment and value will supersede anything else unless he felt the risk of his loved one and his self made those facts worth considering.
When people join groups to fight a cause (war, charity function, pandemic, whatever), they have similar goals. When they are with people of those similar goals and similar opposers people tend to stick together like a cult. However, if you send them contrary information that breaks up that cult or group-no matter how factual it is-bias and emotions will always win. It's a human social thing.
Short snip bit:
I'm sure some people are rational minded, but I do believe you guys put too much emphasis on knowledge/content and less on context. Analysis requires both.