This video explains the 3 fundamental parameters of photography. The shutter, the aperture and sensitivity (ISO). These are the building block concepts on which you can build your photography knowledge. So please take the time to understand them.
Tip : shutter speed, aperture and ISO are interlinked when it comes to getting the right exposure for your shot. They also have their own effects on the picture. I will discuss them in detail in later tutorials
courtesy - youtube (channel - DSLRBluePrint)