on VCD's, DVD,s usually by saving the files to the hard drive first for further processing, editing. You can run a capture card and a video card at the same time on a computer.
Many video cards will serve as capture cards, if it can support capture it should have the capture software with it.
I have seen Capture Devices being sold and I honestly don't have a clue what they do..... I know TV cards allow you to watch TV on your computer...... but a Capture Device?

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