I got the software from: http://osflash.org/red5
Then I took my fresh install of Ubuntu 8.10 (Desktop Edition) and ran the Add/Remove Software application. I searched for JAVA and installed: OpenJDK Java 6 Web Start and the OpenJDK Java 6 Runtime.
Once I got the JAVA install I unzipped the software on the desktop and then ran the following commands in terminal: (As root/su)
The terminal window will look locked but the server is running in the background and if you want to stop the server press the CNTRL+C and the server will quit.
tar -xzvf release.tar.gz cd release export RED5_HOME=`pwd` ./red5.sh
Once you get the server running you can verify it is fully working by going to your local machine: http://localhost:5080/installer
I will post the red5 video recorder once I get it working with the server setup. Have fun also check out some of these really cool things you can build with Red5: http://osflash.org/red5/showcase