why are you trying to video this?
You will most likely need to extract still photos afterwards to make a catalog of your items, so why not take pictures to begin with? Video could be good for overall shots, but for individual items, not so much.
You are filming HI8 which is really low res, your average digital camera will be better suited in terms of quality and practicallity.
Not to get too specific with models, but you could get something like a Dazzle capture usb capture card, or something like an Easycap DC60+
You will find loads of tutorials online.
BUT the biggest problem you will run into is while doing your capture, because the video will most likely not be one straight shot, lots of cuts, your capture software will stop recording each time the image goes out of sync because the image will "jump" when a new portion is filmed, causing the capture to stop.
Complicated explanation I know. But essentially for every new filmed sequence, you'll have to restart the video capture.