If you want to show #PeerTube to friends but you're worried about NSFW videos appearing on the front page, you could try showing them this instance:
A couple of other safe interesting instances too:
VidCommons: a collection of creative commons and public domain films
https://vidcommons.org
Blender: the official PeerTube instance for the Blender foundation, including their films
https://video.blender.org