For a more permanent collection, consider buying the Blu-ray or DVD of "Tenet," which would offer the best video and audio quality.
Sator is attempting to assemble an "Algorithm," a series of nine physical artifacts that, when activated, will reverse the entropy of the Earth, effectively wiping out the past and everyone in it. The Mechanism:
Tenet review: Christopher Nolan's thriller is a palindromic dud
He looked at the file name again. Tenet.2020.720p.mkv .