You’re taking the piss right? Those seem like perfectly reasonable responses.
What video card is required to use it? None, it can be used standalone.
What video card to use it streaming from your PC, at least a 580 sounds okay for some games. You seem to be expecting it to lie, and then inferring truthful information as a lie because the information you held back (which game you want) is the reason for the heavier video card requirement.