This lecture explains the importance of internal programs in electronic devices, using the Thymio robot as an example. It delves into how these low-level programs manage essential functions like power supply, engine speed, and sensor activation, even when the device appears to be off. The instructor demonstrates how these programs ensure consistent performance and functionality in devices, such as robots, TVs, and lights, by continuously monitoring and controlling vital elements. By examining the Thymio robot's internal program, viewers gain insight into the intricate relationship between electronics and mechanics in modern devices.