I don't think the video is conclusive that they were playing on a dedicated server and not just a private match with the Console unlocked. Either way it just shows what kind of variables you can change to mix up game play.
I'm amazed at what the modders have been able to do in such a short period of time. You can download a game for free and play online along with legit versions on IWNet, however you'll be able to use the console, lean, change FoV, etc. It's not that IW didn't code that stuff into the game, they just decided to not let people use it.
Now there's talk that the DLC to be named and released later is already present and can be enabled via the console (like different game modes, maps, perks). The more I hear about this game, the more IW becomes a joke to me. Did they think PC gamers were to stupid to figure out the game code and variables? Looks like there are much more talented modders out there than IW's developers, and they do it for fun.