The video tutorial explains the concept of constants, highlighting their immutability compared to variables. It covers the proper naming conventions for constants, which should be in uppercase. The tutorial also discusses overshadowing variables, demonstrating how variables can be overridden, unlike constants. The importance of using constants to maintain unchangeable values in code is emphasized. The video concludes by encouraging viewers to practice and experiment with the concepts discussed.

What new insight or understanding did you gain from this video?