Amazon has a bunch of Great Courses "seasons" marked down to $0.99 each (usually single episodes are around $1.99-$2.99 each with many episodes per season). I don't have a full list, but here are some and others can be found searching for Great Courses in the Prime Video section and looking at prices. As always check to make sure the price hasn't gone back up before hitting buy. Think college lectures more than traditional documentary.
Ancient Civilizations of North America
https://www.amazon.com/Watch-Trailer/dp/B07M62BXTM
The Celtic World
https://www.amazon.com/Watch-Trailer/dp/B07MVK3SKS
Your Deceptive Mind: A Scientific Guide to Critical Thinking Skills
https://www.amazon.com/Watch-Trailer/dp/B0711ZKFJG
The Everyday Gourmet: Cooking with Vegetables
https://www.amazon.com/Chili-Peppers/dp/B071SG7H8X
Understanding Modern Electronics
https://www.amazon.com/Watch-Trailer/dp/B07K8V8KWM
Maya to Aztec: Ancient Mesoamerica Revealed
https://www.amazon.com/gp/video/detail/B0759ZMM65
How You Decide: The Science of Human Decision Making
https://www.amazon.com/gp/video/detail/B06XXVK9XK
Forensic History: Crimes, Frauds, and Scandals
https://www.amazon.com/gp/video/detail/B07M9DLWS8
Anthropology and the Study of Humanity
https://www.amazon.com/gp/video/detail/B07JCLDQ41
Understanding Investments
https://www.amazon.com/gp/video/detail/B07M62BBTJ
Do-It-Yourself Engineering
https://www.amazon.com/gp/video/detail/B07HKQB3HV
Radio Astronomy: Observing the Invisible Universe
https://www.amazon.com/gp/video/detail/B07GHRYY3M
Learning French: A Rendezvous with French-Speaking Cultures
https://www.amazon.com/gp/video/detail/B0794CYR8M
The Art of Public Speaking: Lessons from the Greatest Speeches in History
https://www.amazon.com/gp/video/detail/B071CM27YW
Medical School for Everyone: Grand Rounds Cases
https://www.amazon.com/gp/video/detail/B078KMDJD2
Law School for Everyone
https://www.amazon.com/gp/video/detail/B07BQJKDSY
The Barbarian Empires of the Steppes
https://www.amazon.com/Early-Nomads-.../dp/B07KQJJZVK
The Big History of Civilizations
https://www.amazon.com/gp/product/B071P8SDGT
The Modern Political Tradition: Hobbes to Habermas
https://www.amazon.com/gp/product/B07HKT1S3K
A History of British India
https://www.amazon.com/gp/product/B07579R9D6
The Learning Brain
https://www.amazon.com/gp/video/detail/B07M9SK58R
How Jesus Became God
https://www.amazon.com/The-Birth-of-.../dp/B07JVQRDM3
The History and Achievements of the Islamic Golden Age
https://www.amazon.com/Ibn-Battutas-.../dp/B079ZJWRL5
The World's Greatest Churches
https://www.amazon.com/Great-Churche.../dp/B0714L6XX8
Discovering Your Roots: An Introduction to Genealogy
https://www.amazon.com/Your-Ancestor.../dp/B075B1BBYC
How to Grow Anything: Your Best Garden and Landscape in 6 Lessons
https://www.amazon.com/Design-Light-.../dp/B07D44YTSV
The History of Christianity II: From the Reformation to the Modern Megachurch
https://www.amazon.com/Eastern-Ortho.../dp/B07GQ8Y1H8
Understanding Imperial China: Dynasties, Life, and Culture
https://www.amazon.com/gp/video/detail/B07JCVG5DJ