Yup, I agree, I've tried this a long time ago with a PSX. I connected it through a capture card and it was unplayable. The lag between when I pressed a button and when something happened on the screen was immense, like 1 or 2 seconds. So it's not possible. Unless you're able to record a replay on your system, then connect it to the capture card, and play the replay through the capture card, then it would work.