Most cable boxes have a dedicated audio digital out (many TV's do as well). I did a survey a while back on another forum and the majority of people do not run the video signal at all to the a/v receiver. I have never used the receiver's video functions. I watch most of my TV (mostly news, etc) the TV speakers. Your video will only be as good as the capability of your TV. I run HDMI direct to TV, TOS link to receiver. Same with video players.