Best Practices for Time Travelers (2003)
There is no such thing as time, or time travel. There are only positions of particles. To go back in time by 1 minute, all particles in the universe have to be moved/changed back to their previous position. This is not time travel, but universe manipulation except for one subject. If there were parallel universes with every possible outcome and you traveled to one, this would also not be time travel, but a moving to a place that looks like another place where particles were at a certain position. Time is just a way to label snapshots of particle positions in the universe.