Screencast is a video screen capture utility. It is based on Recordmydesktop by John Varouhakis. It captures the screen to a video file which is in Ogg-Theora-Vorbis file format.
Where to get it
It can be downloaded from http://dev.laptop.org/~cjb/screencast/Screencast-1.xo
It is thought to be buggy but the following patch has allowed video to be saved to the Journal. Open Terminal and change to directory /home/olpc/Activities/Screencast.activity and replace the file pippy_app.py with this file (renamed to pippy_app.py)
(it would be a good idea to backup the existing file first, eg mv pippy_app.py pippy_app.bak)
The Screencast application
The Journal listing three saved videos