It is so cringe people immediately jump to censorship when a youtube channel gets randomly banned. This will probably be resolved in some immediate timeframe. Channels get auto banned all the time for false flagged content from youtube's automated systems.
There is no attack. This happens to random medium sized channels daily. The difficult part is getting in contact with someone at Youtube that can clearly explain the situation. Really that is the impossible part. I don't understand why we are so eager for conspiracies and to be victims rather than think about things critically and stop assuming.