This video takes us behind the lens of a 41MP Nokia Lumia 1020. This is quite cool - a 3D visualisation of how a camera works, even if I think we'll have to accept that they've definitely embellished the process in a very magical way for the enjoyment (and attraction) of customers.
Really, though, it's quite difficult to visual how a camera works. Mobile cameras as well. Even when you understand the concepts, it's not as easy as showing it from step to step: how do you show the way that light is captured and changed into an image we can view? How do you represent that in a viewable way, considering that our eyes, too, must change the light into the image we are seeing of an image that is being seen?
Did that get confused? I'm confusing. Enjoy!