The scripts are part of a project - Car RaspBerry pi Dash Cam. Full explanation could be found under
the instructables website - http://www.instructables.com/id/Car-Raspberry-Pi3-Dash-Cam/.
It Explains about :-
1) Hardware/Tools required
2) How to connect the components together
3) Use the scripts uploaded here
4) How to connect to the car
5) Perform some testing