What submixes are for and how to create a submix in Ardour 3.
Recorded using key-mon to show the keys and mouse buttons that are pressed:
http://code.google.com/p/key-mon/
I use a little script to record the webcam video and screen and jack output:
https://gitorious.org/goibhniu/screen...
Afterwards I edit it in Kdenlive.
The distro I use is http://nixos.org