My HD DVR is currently in the "video in" port using the red/yellow RCA cable. I may consider using the "tape in" ports but in all honesty, the back of my stereo is not easily accessible. That's why I was hoping for some sort of converter that I could plug the HD DVR and blu-ray player (using the optical/digital coax/HDMI ports) into and then the red/yellow RCA would run from the converter to the stereo. So I would only have to unplug the red/yellow RCA cables from the HD DVR and plug them into the converter without having to gain access to the back of my stereo.
Can you provide some models of the external switch?
Was hoping to continue using my existing system until I have to replace it.