Explore a 20-minute video tutorial that demonstrates how to determine the principal axes of inertia for a system of three masses without using the inertia tensor. Dive into a practical model and accompanying Python code, available on Trinket, to visualize and understand this concept. Build upon previous knowledge from related videos on moment of inertia, angular momentum, and eigenvalue problems. Gain valuable insights into advanced physics concepts and their practical applications through this educational content from Dot Physics.