Maybe it’s worth having a diaspora* account too since there are 750k users on the network (maybe with a significant overlap of Fediverse users).
There are still plans to integrate diaspora* into FreedomBox. It’s mentioned in Apps almost ready for FreedomBox but not officially on the road map since we’re not sure when the Debian package will be ready. I’m in touch with the Debian developer leading the effort to package diaspora* and Gitlab (both are Ruby on Rails applications). We can have it in FreedomBox as soon as the Debian package is ready.
All the services hosted by mastodon.host seem to be down at the moment. They hosted one of the earliest PeerTube instances. We don’t have a backup of the video channel unfortunately (an unfinished task on my task list 
).
We should probably host an official PeerTube instance to distribute the videos, just like Blender Foundation did. There’s also a PeerTube instance hosted by Debian at https://peertube.debian.social where we can create an official FreedomBox channel. I personally prefer the former because of the 20 GB video quota limitation on public instances.