Cylons

Evil machines created by humans
The Cylons are machines created by humans who later turned on their creators and attempted to destroy them.

Historical films shown on American TV
Generally accurate historical films about the Cylon rebellion and the resulting wars are shown on the American basic cable channel Sci Fi, aka The Real History Channel.

These documentary films were created by the humans who fought the Cylons and present a generally accurate depiction of life on the rag-tag collection of human starships and on planets like New Caprica. But because the films also served as propaganda for humans in their long war, they tend to overemphasize the heroism of humans like Adm. Adama and Starbuck.

Tek Janson is the real hero
The real hero of virtually all of the incidents depicted in the documentary films was, of course, Tek Janson.