"The creator further explained that the “satirical piece” was intended to “to lampoon the anti-science perspectives which were arising at the time”.
"A black and white video is being shared on social media that appears to have warned in 1956 about a future COVID-19 pandemic. Pointing to the purported date of creation, some users claim the footage is evidence that the outbreak, which has taken the lives of over 2.8 million people around the world, was planned. This is false: the compilation of footage was created in 2020 and was intended as SATIRE."
https://www.reuters.com/article/factcheck-satire-not1956video-idUSL1N2LK20S
I can see people believing this!