It's literally terrifying that they removed this video. Someone uploaded a copy: https://www.youtube.com/watch?v=25m0fm2LSIg
They said they're culling misinformation and they're doing it. I don't see what's terrifying about this. Maybe unsettling if you're aggressively pro-free speech, but 'terrifying' is very hyperbolic.
Here is a larger scenario. I personally think a lab oversight in the Wuhan region could have led to a virus outbreak, enough to at least discuss it. This theory could be deemed by WHO, which could be heavily influenced by Chinese investment, to be lies. With YouTube’s blanket policy, they would be doing the Chinese government’s bidding by getting rid of this lab virus narrative from Youtube (all under the guise of following WHO guidelines).
Anyway, you cannot censor based on an organization or a government’s guidelines.