1) To get premium HD channels you need an STB or cable card. Each has it's pros and cons, an STB can give you on-demand, PPV ordering through the remote and guide info where a cable card installed in the TV can give you possibly better PQ since you are using the tuner in the TV.
2) I think it's just showing all the possible connections, if you have an HD STB, you'd need to use component, DVI or HDMI.
2) I think it's just showing all the possible connections, if you have an HD STB, you'd need to use component, DVI or HDMI.