You're post prompted me to go poke around the United States Government Films archive. The gov't is clearly not out of the film business.
We apparently have a Federal Judicial Television Network. Who knew? They have a ton of shows in the archive. Mainly about dealing with this or that law or type of case. Two that didn't appear to be related to dealing with types of cases caught my eye:
Leadership Lessons from Recent U.S. Presidents (2004)
https://archive.org/details/gov.ntis.ava21306vnb1
Discussions about how Carter v. Reagan managed things. Some commentary on good v. bad .
Not sure why, in 2004, there would be nothing on Clinton or Bush I.
Age Matters: Generations Working Together in the Courts (2004)
https://archive.org/details/gov.ntis.ava21334vnb1
A Millennial describes having to learn to use a typewriter (had never seen one). Make you wonder what they are still using typewriters for.
And then there's this from the Nuclear Energy Institute:
American success story: the safe shipment of used nuclear fuel (2001)
https://archive.org/details/SafeShipmentNuclearFuel
And something more recent from Department of the Army (well, more recent than '46):
African Americans in World War II: Legacy of Patriotism and Valor (1997)
https://archive.org/details/gov.ntis.ava20001vnb1
Another couple oldies that caught my eye
Couple more oldies:
War Department
A Tale of Two Cities: Hiroshima and Nagasaki (1946)
https://archive.org/details/gov.fdr.301
How justified and necessary...
Department of the Army
Nuremberg (1945?)
https://archive.org/details/gov.ntis.ava02601vnb1