In above video SusanCrosson has explained expanded accounting equation about the expanded form of Accounting Equation. We know that accounting question is Assets = Capital + Liabilities.
But if we expand it then its form will be following.
Now, we can find that Assets = Liabilities + stockholders equity is balance sheet but expended accounting equation also includes result of profit and loss account in this equation by adding the excess of revenue over expenses in it.
Related : Accounting Basics 5 - Stockholders Equity