There have been a lot of zombie movies and they all seem to have "dead" in the title.
"Night of the Living Dead" (1968) -- with all its endless remakes and sequels -- is the most famous.
"The Plague of the Zombies" was a 1966 flick from Britain. "Orgy of the Dead" was a 1965 American one.
And lo! "Creature of the Walking Dead" was a 1965 low budget exploitation film that got very low ratings from critics and viewers. So that must be the one.
About O'Reilly: he's sort of right, but it's been that way for a very long time, at least since cable broke up the old three network monopoly.
The difference with the AMC show is that the title refers to the human characters.