Let me try being the devil's advocate here. With so many content being uploaded, it's better to err and not promote any video that could be an allusion to terrorism, sexual content, and so on. If humans were moderating youtube it would be worse and the amount of people needed would be impractical.

At the same time, the author gets much more views saying his video was censored than if he was just one more video made on the platform. Just like singers would look for the +18 black mark on their LPs back in the 80s/90s.