I have an HDTV but I use the red/white/yellow cable that comes with the Xbox to play minecraft. Do I have to get the HDMI cord to play splitscreen?
Yeah, you definately need an HDMI cable if you have an HDTV. That or, as Poetic said, component cables. You can get an HDMI cable on Amazon dirt cheap and if you've been playing any Xbox games on the old style cables, seeing it in real HD will be like seeing a next gen system by comparison.