Product placement
ESP32: it is a microcontroller that acts as the brain of the soldering fume extractor, controlling the fan and LED ring. It merely APPEARS as a component being installed. Removing it would change what happens in the video.
Schematik.io: it is a platform that helps users build hardware projects by generating code, wiring, and guides. It ACTS as the tool that enables the creation of the soldering fume extractor, and is explicitly mentioned as the means by which the viewer can build anything. Removing it would change what happens in the video.