Unless you are using a capture card, I would say you are going to run into problems. 99.99% of VGA and S-Video connections on laptops are output to display only.
In fact, I have yet to see one that takes an input.
And I don't think I've ever seen a VCR with VGA output before.
You would be better off getting a cheap USB capture card that allows composite connections. Then you can use any VCR that supports composite/scart (99% of them).
Fairly cheap, and no wild goose chase attached