We can break this off into another thread, but it might be relevant: how do I host things there? What am I allowed to host? What happens if I break the rules? What are the rules?
Asked rhetorically, and I am not suggesting those questions are automatically answered by going with PeerTube, but in my experience they are a lot easier to answer when I am setting it up.
The Commons and The Archive, as I will now be referring to them, evermore, are terrific, and I would love to contribute and use it for archiving my media, but I’ve had a photo deleted from Wikipedia because it wasn’t as relevant anymore, and IA’s TOS states in a couple places:
Access to the Archive’s Collections is provided at no cost to you and is granted for scholarship and research purposes only.
and
The Internet Archive (the “Archive”) is committed to making its constantly growing collection of Web pages and other forms of digital content (the “Collections”) freely available to researchers, historians, scholars, and others (“Researchers”) for purposes of benefit to the public.
I don’t know if the collection of the most adorable Clover pics truly has academic value or is of benefit to the public, though of course I have strong suspicions and will ultimately be validated by the jury of history. 
I am not 100% sold on PeerTube as the family video archive thing I am looking for, and I will need to run it for a couple of years before I can say, “yeah, this is a reasonable amount of effort and computing resources for folks”. But self-hosting seems easier to participate without joining bureaucracies, even if the “self” is a tribe or specific org.
Also, the same way Mastodon instances may have a focus, I think we’ll see the same thing here. I personally expect to find maybe half a dozen instances and that will be it, I won’t need more video than that, I’ll have my fix. It is a neat side-effect of federation.