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if you have a hi-8 or di-8 video camera you can connect it to your computer via firewire. the programs to capture video off of these are clunky but they work much better than other programs which use USB connectivity. i have a sony handycam DCR-TRV460 and this is how i do it. sorry, i forgot the name of the program i used, it came with the camera, i think.

just make sure it's firewire, it works much better than other methods of connecting camcorders to your PC.