Except it's not really gyroscopes, but gyrometers. The literature is very sloppy with this, but gyroscopes give you an angle, while gyrometers give you an angular velocity.

Using a gyroscope, you can look at it an hour after starting it, and understand how your orientation changed. Using a gyrometers, you need to continuously integrate the result (including the measurement error) to get your orientation: it's far less precise and tends to drift. Both laser and mems gyrometers suffer from this.

Besides this, the video is full of slop and likely AI-narrated. Someone mentioned the bacteria bit, I can also mention the weird-looking PCB image, where traces do not connect correctly to the chip.