> As I read [0] it is not, in fact, a blanket declaration about transmissibility.
It's still misinformation, and it's specifically misinformation that makes the WHO complicit in 187,420 deaths and counting. There had been plenty of indications by that point that - even if human-to-human transmission had not yet been confirmed - it was still evidently spreading beyond people at ground zero.
That is, I ain't sure how you're able to read it as anything but a blanket declaration. The WHO outright said that there's no evidence of human-to-human transmission; this is an outright lie, given that the sheer number of people by that point who were hospitalized with the virus without ever having visited the Huanan Seafood Wholesale Market would be, I would argue, evidence.
> When read [2] it's clear that it is not a blanket declaration not to wear masks.
No, but it's advice that - if followed - would make any asymptomatic carrier dangerous. The point of wearing masks is not to prevent yourself from being infected (no mask is sufficient for that), but rather to minimize the risk of you spreading SARS-CoV-2 to other people by breathing on them.
The WHO seems to have a chronic pattern of being one or more weeks behind the curve on its assessment of COVID-19 and the mitigation thereof. Needless to say, I trust them about as far as I can throw them (which is 0 meters, given the impossibility of throwing an entire organization), and that YouTube is putting them on any kind of authoritative pedestal despite these blatant missteps is ignorant of that behavioral pattern.