Yes it is possible to capture video from any TV Card. The card should have come with some type of software package, but if it didn't there are many software "capture" programs available, some free, some not.
Either way, the device will still have to be configured and drivers loaded (audio/video capture device drivers) for it to work properly.
A little more info, the name of the card, manufactor, BtXXX chipset, would be helpful......
