Does youtube even care? Aren't there a lot of anti-china documentaries/videos on youtube? Or do you think that those flew under the radar because they're not popular enough?
Most of the Youtubers who document what goes on in China are regularly demonetized. The CCP knows how to use Youtube's rules against creators.
Not completely equal but youtube did block "Innocence of Muslims" in multiple countries.
They only blocked it after Obama and Hillary (falsely) blamed the video for the 2012 Benghazi attack.