That is not true, in the Netherlands a critic had one of his videos pulled by YouTube for claiming COVID-19 spreads through aerosols when this was not the consensus. Yet.
I looked and couldn't find anything to suggest this person was banned from YouTube.
I am not sure if the comment above me was referring to him, but I know back then they called what he was claiming (improving ventilation) misinformation.
He was not banned but he had a video pulled because it didn’t agree with the ‘scientific consensus’