Hi How can you add Ranking or leveling system on Unity Updated version?

Hi How can you add a Ranking or leveling system on Unity updated version? or where can I find on Unity community Tutorials how to crea a games and add leveling or ranking game system every time I watch how to create a game tutorial on youtube-e everyrhing is so blurry and can't see a thing I need a clear video no blurry to create a game Tutorial? thanx a bunch

 

This is not a work in progress.... This video shows a simple ranking system, ignore the fact that this is a series, the ranking script works fine.