There is no way to draw a single 17:33 consistent line across spacetime that all observers agree separates has happened from hasn't happened yet. The failure parade. Some physicists argued this was a mathematical convenience with no ontological weight. But no experiment has ever found a preferred frame that would let now become absolute again.Not correct. Such a frame is given by the Cosmic microwave background.
This video is AI generated, so should not be taken too seriously. It is a common error, so I point it out.
