CPTL = Captivate template
CPVC = HD Video Demo (pure video, has a dedicated UI, the Video editor)
CPTX = normal Captivate file
The second was new to Captivate 6, the other two exist since many versions.
Have a look at YouTube and at the Captivate blog (webinars, recorded and life): http://blogs.adobe.com/captivate/
If you want F2F training, try to google? I am not blogging for the moment, and most of my articles were about advanced topics.
Lilybiri