You want composite input to your laptop? most mid range to high end graphics cards come with an adapter for that, but I'm not sure about laptops.
a bit of quick googeling gives something like this: http://www.usbgear.com/USBG-VX6.html
I would have though USB slow for streaming uncompressed video but apparently it's possible.
Search for 'composite to usb' and that will give you what you are looking for.
E: "Did they... did they just endorse the combination of the JSDF and US Army by showing them as two lesbian lolicons moving in together and holding hands and talking about how 'intimate' they were?"
B: "Have you forgotten so soon? They're phasing out Don't Ask, Don't Tell."
a bit of quick googeling gives something like this: http://www.usbgear.com/USBG-VX6.html
I would have though USB slow for streaming uncompressed video but apparently it's possible.
Search for 'composite to usb' and that will give you what you are looking for.
E: "Did they... did they just endorse the combination of the JSDF and US Army by showing them as two lesbian lolicons moving in together and holding hands and talking about how 'intimate' they were?"
B: "Have you forgotten so soon? They're phasing out Don't Ask, Don't Tell."