Did you watch the video at all?
* You deposit $10 at a bank
* The bank is allowed, to lend a *multiple* of that $10.
So it can now lend say $60 out. Even though it hasn't got $60 to lend. It's created the extra $50 from thin air.This is not how normal lending works. It's like if you lend me your bike, and I have magical powers that allow me to then summon 4 more bikes out of thin air, so that I can lend out 5 bikes.