Wanting to live stream Snes and nes

[Fontdizzle]

Hello everyone I want to start up a live stream devoted to old school video games considering I'm collect them. My question is what do I need to live stream them. I'm assuming you need something to capture what's going on on my tv and put it onto my computer. The tv I'm using at the moment only has VGA cords so I'm not sure. Any help is appreciated!
Thanks!