If you can run it in on a standard Coax RF cable it should appear on channel 3 or 4 and you can record it from there, if it runs in on a different type of cable it could be more interesting.
OK.... From both both devices I can have 3 cables (I dunno name for it because English language is not my native language) but those cables looks like 3 cinch in 3 colors (white, yellow and red) which I suppose to plug into TV capture card. Also I might use S video in and out but only if I have to.
Now I want to know did anybody try to grabb something from eg. VCR and does it works? Is quality good? If not is which TV card for grabbing you can recommend please? Grabbing is my priority and second one is if I can watch TV.