I recently purchased a DVD published by AGI(AGI - Home) the video shows the complete breakdown and reassembly of the firearm. I bought the Savage Arms 10-116 Dvd, to help me fix some problems with my deer rifle.
The video was very thorough and helpful.
A friend loaned me an AGI video on the S&W M&P series and thought it was put together by a bunch of high school kids.... and a cameraman with some sort of neurological disorder.
It was extremely amateur. The host was a babbling idiot with a fingernail fungal infection that made my stomach churn on the close-ups.
Hopefully some of their other videos are better..
I have the AGI videos on how to build a 1911 from a race ready kit. I think it's well worth it for anyone who wants to build a 1911.
The production value was a little poor for a $60 video but I learned what i wanted to learn