One of the main characters (Aaron) fled the country and is seen with the people in the warehouse presumably making a bigger version of the machine for unknown r

One of the main characters (Aaron) fled the country and is seen with the people in the warehouse presumably making a bigger version of the machine for unknown reasons. The other one (Abe) stayed back and kept on trying to travel to the past and messing around with the machine so that his (and Aaron's) past selves will eventually give up assuming that the machine doesn't work. But this seems to have been thwarted by one of the future-Aaron's as he has sent a recording detailing the whole scenario to some unknown recipient (this recording serves as the narration of the movie).