The scientific consensus was that there was no evidence that mask would work (or not work) for 2019-nCoV. There's plenty of evidence that it helps prevent transmission of other respiratory viruses.

So which hypothesis would have most likely been true at the time? Not to mention that Dr. Fauci himself had admitted that it was a noble lie (aka pure propaganda and falsehoods).

That’s a slightly better description of what happened. And I will say it again: two wrongs don’t make a right.

Surely it would be great if you might provide a better description of the event (and the timeline, long after the outbreak in Wuhan).

Surely. But frankly I don’t feel like it.

Does Youtube reinstate the videos when they become true? ;)

Not directed at you, just to get that out of the way. But I am quite fed up that the masks-don't-help meme is constantly brought up. That was in early 2020, a lot of mistakes were made back then because nobody really knew what they were doing.

Especially because it usually brought up by people that are consistently wrong about pretty much everything, while propagating active lies, as a defense against anyone pointing out the utter BS they are spreading. That gets tiresome.

Ah, I didn't say that, did I? I am just tired of having the mask debacle from early 2020, and that is the only real issue that is constantly brought up to discredit the WHO/CDC.... because as you said, people make mistakes. I, for what it's worth, trust people that correct their mistakes over people that never do. because the latter never learn. And they have the tendency to put as much theories out as they can. Because then they have a high chance of being right at least once. Doing that long enough and they can claim to be right all the time. Which, obviously, they aren't. But it's incredibly hard to call them out on it.