There was a point in time when the CDC were saying that masks are innefective at controlling the spread. I assume that was to mitigate hoarding in an effort to

There was a point in time when the CDC were saying that masks are innefective at controlling the spread. I assume that was to mitigate hoarding in an effort to keep medical professionals supplied. If I had made a YouTube video explaining the effectiveness of masks during that time, whose video would have been removed, mine or the CDC's? Who would've made that decision and what method would they have used to reach their conclusion?