You can learn about many, many things. But the best lesson to learn is NOT to trust all you see; that is, be aware that many ALTERNATE facts are presented as truth. And be aware that sometimes the advice you are given is useless, wrong, or plain dangerous. One case in particular should be banned. The YT “expert” claimed to know how to hack his shopvac that wasn’t working. His video showed that he got it operating again — how? He BYPASSED THE THERMAL OVERLOAD BREAKER — this device is there so that if too much current is drawn by the motor, it breaks the circuit. This keeps the circuit from overheating and possibly causing a fire.