I've learned a huge amount of things from video games.
Gran Tursimo:
These taught me tons about cars, in the beginning, I learned that FWD and AWD are more stable than RWD. Later, I learned that FWD is slower than either RWD or AWD when dealing with high power, then the overtakes and general car knowledge came in.
Forza: This taught me better racing lines and better overtake methods, including my late apex overtake method. I also learned smooth car control from this, as well as tuning methods. And this was all self taught.
Starcraft and Age of Empires: These games taught me strategy. I remember playing as the Terrans and putting defensive lines at choke points to stop attacking armies, I learned that the enemy is weakest after a FAILED attack, and that you can amass armies given enough time, but unfortunately, so can the enemy. I remember making two armies, and sending one to the enemy base, waiting for them to send all of their troops, then sending the other one to the back of their base and crushing them, all while having SCVs build upon the wasteland that I made.
So, that's what I've learned from video games. Racing technique, car tuning, general car knowledge, and war strategy.