UVC / QT / DirectShow? For composite / s-video capture

I have a StarTech USB capture dongle for composite and s-video - it doesn’t register with videoGrabber’s list of devices, which I believe are UVC or QT based. In MaxMSP I am able to view it as an input device though, so I know it’s possible. Any pointers?

Thanks!

(I am using jit.qt.grab in Max)