using built-in webcam on 2nd monitor

Aloha all from Hawaii.

First post here.

I am running a older iMac (G5 non-intel) with a second (non-mac) monitor.

The iMac doesn't have iSight, but the non-Mac monitor has a built-in webcam. Is there a way I can use it (for Skype) for example?

Thanks so much in advance

greg