Administrators have full control of the content they accept and they decide whether sensitive content (violence, pornography etc.) is displayed by default or not.
But what if you need to serve more users? That's where PeerTube's federation feature shines. If other PeerTube instances following yours, chances are they have decided to mirror part of your instance!
Consequently, PeerTube development and/or management of websites associated with the PeerTube project (<a target="_blank" rel="noopener noreferrer" href="https://joinpeertube.org">joinpeertube.org</a>, <a target="_blank" rel="noopener noreferrer" href="https://instances.joinpeertube.org">instances.joinpeertube.org</a>, <a target="_blank" rel="noopener noreferrer" href="https://search.joinpeertube.org/">search.joinpeertube.org</a>, etc.) may not please everyone (in particular because of different ideas, ideologies of cultures).
