It is possible to rewrite all of physics in terms of energy.

The video explains the theoretical motivations behind Lagrangian Mechanics, as well as how it leads to Noether's theorem applied on empty space.

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Timestamps:
0:00 - Intro
1:18 - Newtonian Mechanics
2:34 - Newtonian Weakness
3:47 - Lagrangian's Inspiration
5:34 - Euler-Lagrange Equation
7:17 - Noether's Theorem
8:37 - Outro
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Music: Mark Tyner - Close To You