Hi,
We are thinking of posting many videos on building AFCS applications along with the SDK. However, as of now, you can look at the blogs and they might have some videos.
Here is the blog link http://blogs.adobe.com/collabmethods/
Here is video of one session Nigel gave in MAX 2008 that is posted on Adobe TV that I could gather from blog. The link http://tv.adobe.com/#vi+f15384v1015.
It gives you an overview of building AFCS applications. A number of things have changed since we keep updating the SDK as well as adding new features and fixes. However, this video will give some idea.
Hope this helps.
Thanks
Hironmay Basu