Now then, to record a demo in RTCW you first need to launch the game and then simply bring down the console and type /g_synchronousClients 1 and hit the ENTER-key on your keyboard. Still typing in the console you input /record mydemo press enter and then type /g_synchronousClients 0 and hit ENTER and a demo recording should be in progress. When you're satisfied with your demo you simply bring down the console again and type /stoprecord.

This is all you need to do to record a demo. Before I tell you how to play the demo back, I 'll show you a simpler way of recording a demo. Bring down the console again and input /bind x "g_synchronousClients 1; wait; record; g_synchronousClients 0;", where x is the key you have assigned to this specific command. You could also locate the file wolfconfig_mp.cfg and add the above command on a new line. In order to stop recording a demo without having to pull down the console, you can add another line to wolfconfig_mp.cfg that looks like this: /bind y "stoprecord".
Now you can start and stop the recording of a demo with a simple push of a button.

Provided that you are not playing any modification for RTCW, all your demos will be stored in \main\demos under your root wolfenstein folder. If, for example, you are using the quite popular mod OSP the demos will be saved to \osp\demos instead.