Every film here plays from the archive that keeps it: the Internet Archive, Wikimedia Commons, the NASA Image and Video Library, the Library of Congress and Open Images (the Netherlands Institute for Sound and Vision). Nothing is copied to this site. Each film's page names its archive, links to its page there, and states its licence or status as the archive does.
Archive films carry no age ratings, so each is placed from the collections it sits in and the subjects the archive gives it, cautiously. Sexual content and nudity are left out altogether.
Little Ones
Films for young children by name: nursery rhymes, lullabies, preschool.
Kids
Cartoons and animation, children's and family films, and educational films, unless they deal with war, propaganda, crime, horror or drugs, or carry racial caricature.
Tweens
Documentaries, science, nature and space, classic comedies, newsreels, commercials and lectures.
Teens
Everything else, including anything we cannot tell about; war, crime, horror and westerns go no lower.
Adult
Sexual themes (such as the old "sex hygiene" films), gore, surgery, slaughter, atrocity footage.