The example in the video is only meant to demonstrate the general use of these scripts for saving information. I cannot guarantee that this is the most elegant or optimized method for saving to a text file, but it worked for me in many projects so far. You can literally save anything you want and trigger the saving process with whatever you want (Triggers, Time, Button Clicks, Quitting the application, User actions, etc.). Loading information into Unity from text files is just as easy with a very similar process. The "save.js" script handles both. With loading data into your environment it's very simple to visualize your results after the experiment (or game session) is done.