The video is a good way to see how some games enter popularity and die off quickly while others stay on top. I wonder about this though:

1. I gathered data from https://store.steampowered.com/charts/mostplayed. The .csv files containing search interest values were downloaded from Google Trends for every character.

...

4) Data modeling through an algorithm invented by me to obtain the most realistic data possible.

So he did use Steam metrics for something (just to get a list of games?), and then what is the data model?