Can you solve this pier puzzle?

The video tutorial explores the problem of minimizing the path between two towns, Mordor and Hogsmeade, by building a pier. It discusses both mathematical and geometric approaches to solve the problem, highlighting the elegance of using geometry and reflections. The tutorial concludes with a reflection on the importance of math in physics and encourages viewers to engage with more brain teasers.

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