Apple origal iSight camera dose not work, the green light stays on for as long as its "Being Used"

Sounds like the camera has failed.

You can try booting into Safe Mode to see if that makes any difference, but this is not a reliable test since some Macs the camera is disabled in Safe Mode (although I guess it would mean the green light would not be present if that is the case).

You can try reinstalling macOS to see if that makes any difference, however, a clean install of macOS is the best test (you could install macOS to an external drive, then boot from that external drive to see if the camera works properly....do not install any software, or migrate/restore from a backup).

if you mean the old isight cam they released back in 2003 then they don't think they support it with drivers any more