When David and Chris first found their dad's old camera (CAM-1) in the attic in Project Almanac, Chris leaves her "present and modern camera" on the table to record themselves while watching what was recorded in CAM-1
The rest of the movie happens...
At the end, the same scene takes place, but now they've found a second camera (CAM-2) and that camera had recorded both of them finding the first one.
How could that second camera had recorded that?
