Imagine a bank lends you some X money to buy your house/car whatever. Before that, the bank had $X in their account, and you had $0 in yours. When they lend you the money, they still have that money, so they are creating that same money that they are lending you. Now they have $X in their account and you have $X in yours.

¿How is that possible? It's simple, when they lend you $X you sign a document saying that you will return that money (with interest, but that's not important right now) and you support that claim with facts, that document becomes a bank guarantee and its tantamount to those $X, and that's why they still have $X in their account. For example, you could support the claim that you will return that money because otherwise they will sell your mothers house/car. In that case (which is very common in Spain btw), they still have those $X in their account because with that they just introduced your mother's house into economy.

I could go into more detail, but, for now, it's enough to demonstrate the kind of false statements you can find in some of those movies.

Of course this system is all but perfect, but don't try to crictizise a system without know how actually works. For example, what happened with the housing bubble was that those bank guarantees were not so sound (you mother's house was worth less than what the bank estimated -and they knew it-).