There's a new #PeerTube instance run by @deadsuperhero called VidCommons which is dedicated entirely to #CreativeCommons and #PublicDomain works:
You can also follow its channels on here:
It's just started so the selection is still limited, but it's gradually building up.
There's also a new tracker-free website run by @kinosocial which has selected CC/PD films from PeerTube and Archive.org:
Some more channels to follow from VidCommons:
mastodon.at is a microblogging site that federates with most instances on the Fediverse.