Would you like to watch the trailer? It's 7 hours and 20 minutes long. It was shot in one take and is substantially longer than the teaser released last year, which is a mere 1 hour and 12 minutes long.
Ambiancé is the new film project by Swedish director Anders Weberg. He bills it as the world's longest film, although The English Patient feels longer. Weberg plans to screen Ambiancé once on all 7 continents starting on December 31, 2020, then immediately destroy all copies of it--presumably for artistic reasons.
-via Ace of Spades HQ