Raspberry Pi Pico W: a microcontroller board that acts as the brain for the IoT project. It is used to run the code and control the display and other components. Its interface is operated, it generates a visible result (the display output), and the creator says what it does for them. Removing it would change what happens in the video.
MicroPython: a Python implementation for microcontrollers. It is used to write the code that runs on the Raspberry Pi Pico W. Its interface is operated (code is written and run), it generates a visible result (the display output), and the creator says what it does for them. Removing it would change what happens in the video.