Second Law of Thermodynamics
A fundamental law of physics mentioned to explain why using humans as an energy source for machines, as depicted in The Matrix, is inefficient.
Videos Mentioning Second Law of Thermodynamics

Neil deGrasse Tyson: The Harsh Truth About Horoscopes (sorry but it’s true)
The Diary Of A CEO
A fundamental law of physics mentioned to explain why using humans as an energy source for machines, as depicted in The Matrix, is inefficient.

Stephen Wolfram — Productivity Systems, Richard Feynman Stories, Computational Thinking, and More
Tim Ferriss
A fundamental law of physics that Wolfram got interested in at 12 years old, relating to randomness and entropy increase, and a project he recently finished after 50 years of work.

Brian Greene: Quantum Gravity, The Big Bang, Aliens, Death, and Meaning | Lex Fridman Podcast #232
Lex Fridman
A fundamental scientific idea that states the total entropy (disorder) of an isolated system can only increase over time, implying universal decay and eventual heat death.

Dr. Michio Kaku — Exploring Time Travel, the Beauty of Physics, and More | The Tim Ferriss Show
Tim Ferriss
The law stating that in a closed system, everything must eventually decay and die (the 'Big Freeze'), but Michio Kaku suggests wormholes could make the universe an open system, providing a loophole.

Roger Penrose: Physics of Consciousness and the Infinite Universe | Lex Fridman Podcast #85
Lex Fridman
The principle that the total entropy of an isolated system can only increase over time, which Penrose uses to question the low entropy state of gravity in the early universe.