How an SLR camera mechanism works - the basics (YouTube)

Hi there
I've just created two videos which describe the very basics of how I perceive the SLR mechanism to work:

Part 1 ---> http://www.youtube.com/watch?v=3rerCe16IrY
Part 2 --->http://www.youtube.com/watch?v=XwnbOsjHzuc

If anyone can think of a more apt sub-forum for this thread to be located, please do say so, as I went through them all, and there doesn't appear to be a non-camera-specific discussion forum.

I hope you find them useful, thank you