This can be done with any DNS server and HTTP server, as long as you spoof everything correctly. It is possible on Windows. I have not tried Mac OS X.
Unfortunately, this currently has little use since Nintendo shut the services down. However, they can still be spoofed if you have everything still on your 3DS. Spoofing your own videos could be possible, but you can already do that with the web browser and something like Universal Media Server.
== External links ==
* [http://www.youtube.com/watch?v=Tl8QYofL1tg A video showing Nintendo Video server being spoofed]