This article covers how to setup Teamviewer session recording and jumps into some of the hidden details and options behind that.
Building from what this article says: http://www.intowindows.com/how-to-record-teamviewer-session/
The recordings are saved into a default folder and they are in their own Teamviewer format. Teamviewer can view these recordings. Note that these recordings are very well compressed and very small. You can convert them to other format like AVI but then the file size will skyrocket.
1. Open Teamviewers main screen
2. Go to “Extras” menu, “Options“, “Remote Control” tab
3. Enable “Auto Record Remote Control Sessions”
TIP: You can change the default save location, by going to “Extras” menu, “Options“, “Advanced” tab and scroll down until you see the “Teamviewer options” section. There you will see the key “Session recording directory“, change that to any folder such as “C:\Data\Teamviewer9Recording\”. Make sure that the folder already exists.
NOTE: sessions are first saved into a temp folder (not the “Session recording directory” for me that was under C:\Users\username\AppData\Local\Temp\TeamViewer\Version9) and when the teamviewer session is closed (in other words everyone that is connected remotely logs out) the full recording is saved to your “Session recording directory”.