Free online Videos and PDF outlines for machining processes -

I found this site link while doing a google search for CNC machining.

There are almost 400 megs of video files. Some are promotions for tapes
available for sale. Others are actual 60 second tutorials on machining.
The PDF outlines cover various machining processes and have Q&A at the end
of each section.

I found every file helpful and I learned something from each.

http://www.sme.org/gmn/video/

SME is the Society for Mechanical Engineering

I hope this helps
-Eric