Practically all cars have Engine control unites. Older ones are simpler, while new are stuffed with sensors and actuators. But his didn’t scared Andrey to build his own Engine Control Unit (ECU) which would take all work from original unit.
Most of his work was reverse engineering of original Ford Aspire 1996 ECU where he could determine signals coming from sensors and control data. Right now it controls fuel injection, ignitions, fuel pump, idle air valve solenoid. As input it reads MAF signal, fuel and timing. Clearly there is much work to do before it could be claimed simple and understandable so it could be used as aftermarket engine control unit. But video proves it working and that’s a good start.