"Video can have noise though, which might as well be grain in terms of the way it affects the image."
Film grain and Video noise could be construed as similar in only the barest of criteria. Since film grain actually affects how an image is produced, and video noise is merely a distortion of a video signal, I'd have to say that they are no where near alike in the way they affect the image.
The OP was confusing because I couldn't tell if he just wanted to add noise to his video or actually match specific film stocks. I still don't really know although it sounds closer to the latter. There are high quality plugins that are actually used to match one film stock to another because you can't always film with the same stock. Just adding noise to one is not likely to match very well.