If you have an actual video card, don't be afraid to open the case and examine it directly. You might get away with keeping it in the slot, and by turning the case, you can get a good view of the card surfaces.
If it's onboard to the motherboard, then things get a little stickier for the novice. However, look for a large ship close to the output jack for the video. Large chip + near output jack = likely video system. The chip will have stuff written on it. Techs can spend 20 seconds to determine this, but a novice may find it a lot more confusing due to unfamiliarity with what these chips look like.