The "only" is a typo.
WHO has been saying "uninfected" people should not wear masks from the beginning. That's bad advice unless you're trying to save masks for medical works which makes it a well-intentioned untruth. Either way I don't like YouTube deleting a video that contradicts this WHO "advice".
"Wear a mask if you are healthy and you are taking care of a person with COVID-19."
Besides, like I said this is not the only place they've said this. They've been consistent in down-playing the importance of masks.