Since the beginning of the 20th Century, the US Government has produced films for a wide array of purposes. This highlight reel, created for the US National Archives Films of State conference, showcases government film in its many forms, from military actuality to Smokey Bear public service announcement.
Library of Congress National Screening Room
Imperial War Museums - limit your search to "records with digitised media"
The National Archives (NARA) on YouTube
The National Film and Sound Archive of Australia on YouTube
United States Marine Corps Films (University of South Carolina Moving Image Research Collections)
Texas Archive of the Moving Image (category: "industrial films")
CLIO Award Collection (Indiana University Bloomington)
The Living Room Candidate (Museum of the Moving Image) -- presidential campaign commercials (1952-2020)