With X and Y on the horizon, I'd like to be able to capture my game play to put into videos on my YouTube channel. However, I have no idea how to do this. People tell me there's a capture card, I don't know what that means. Is it something that I just attach to it or plug in or is it built in? I already have a 3ds XL, so I'm hesitant to buy a new one. So how do I capture gameplay?