'it' - You aren't defining 'it'. I said that you bring the Satellite signal from outside into your home on cables and those cables MUST go to converter boxes. They do not go to a receiver, to a TV, to your DVD player, to your VCR, or to ANYTHING else. They first, above all else, go to a DirecTV satellite receiver, which takes the raw satellite signal and converts it to a standard format that your receiver or TV, VCR, etc. is capable of dealing with.
It is 100% dependent on the model of DirecTV receiver you have in each room that decides what signal comes out of it. If you want HDMI, then buy a DirecTV receiver that has HDMI output. If you want something else, buy a receiver that has 'something else' whatever that something else is.
What are you trying to do, and what are you confused about?
I'm struggling to think of a real world analogy to what needs to happen... Perhaps like buying tires for your car. The tires don't make the car go, it's the engines job, but, it sounds like you are asking if you can just put the tires under the car, even without an engine in the car, and expecting the car to go. The tires are the satellite feed into your home - but the satellite box is the engine that actually does something with that satellite signal.