The Internet Archive should have plenty of public domain movies.

Not exactly what you’re asking but you make me remember the animation films from blenders: https://studio.blender.org/films/.

Might also try your local library and see if they give you free access to hoopla and kanopy!

vodo.net used to host loads of CC movies.

Most of the ones on this list are probably available on archive.org/torrent/web to download.

Some really nice films/animations mixed in there.

(From memory, Mark Thomas, The Yes Men, California Dreaming, Couchsurf, A Grain of Sand, Crazy Golf, and I Think We’re Alone Now would be some good starters)

There’s a lot on PeerTube. You can search on sepiasearch.org and filter the results by license. fedi.video has a bunch of uploaded PD/CC videos.