These videos are from the Banking and Money section of the Khan Academy. Log in on this page with your Google Account to get credit and watch these videos on their Khan academy page.

There are 24 videos in the Khan Academy's playlist for Money and Banking. Here are the first 2:

Banking 1

Khan Academy page
Introduction to how banks make money and the value they (potentially) add to society.

Banking 2: a bank's income statement

Khan Academy page

Read about the history of banking

"Primarily, to provide a secure place to store wealth held in the form of readily available money.
But like all enterprises staffed by humans, banks also exist in order to make money.
Banks make money by taking a portion of the money that is stored in them and loaning it to other people and companies in exchange for a promise to repay the loan, plus interest. Banks compete for deposits through the interest rates on the money stored in them. The difference between the interest collected by the bank and the interest paid by the bank contributes to the income of the bank. Banks also charge fees for various services, all of which involve moving money from one account to another or issuing checks and credit cards. Plus there are fees for processing loans, etc..
As a result of these various activities - without which the bank would not make any money - banks are now considered vital to economic development through their prudent investment of portions of the wealth stored in them. Banks are also considered integral to various other functions related to the management of the nation's money supply and systems of credit.
However, regardless of what banks now do, they exist first and foremost as a secure place to store wealth held in the form of readily available money. If a bank can't do that, it quickly loses credibility as a bank. Once that happens, it won't be in business for very long."
Read more:

First of all remember, a bank is a just like any other business: it strives to make as much money as possible. They make money by simply moving money around; keep that in mind as we go through the different services that a bank provides.
Most people the first service that they become familiar with in terms of a bank is a savings account. At first glance, a savings account is a situation in which you give a bank your money for a period of time, withdraw it whenever you like, and depending on how long leave it there it earns a small amount of money for you. What actually happens, though, is that a savings account is actually a loan, except this time you’re the lender. It’s no different than any other loan, except it’s really flexible: you can lend as much as you want to the bank and get that loan paid back whenever you’d like. Because of this flexibility, though, the interest you make on this loan is pretty low.
Likewise a checking account, at most banks, is no different than a savings account: you’re lending the bank your money, but with a checking account, they pay your interest with services (dealing with the checks you write, etc.) instead of interest.
The other major area that people think of when they consider a bank is loans: they lend money to people for buying a home, car, and other things." Read more: