An advertising company deciding what is credible or not is scary.
1. https://www.who.int/images/default-source/health-topics/coro...
No, YouTube still is determining credibility. YouTube is still saying, "this video is misinformation and we are removing it." The fact that it's treating the WHO information as the baseline does not change the fact that YouTube is deciding credibility, and removing videos that do not meet it's criteria for credibility.