Best lens for shooting video with nikon d5100?

I'm interested in buying the nikon d5100 for filming videos, I will also take pictures but they aren't priority. I'm thinking of buying the body only so I can get a lens more suitable for filming. I don't want something extremely wide-angled, but also not something extremely zoomed. I don't need anything that can get an entire skyscraper from a short distance. I will be sitting in a chair about 3-6 feet from the camera and want my to be able to see both above the tip of my head and below my collar bones. I hope I specified enough. My price range is quite low, the cheapest lens that fits most of these guidelines will be the one I want.

Buy a Nikkor DX VR G zoom 18-55mm from seller tagged " adam5819" as advertised in Ebay.com cameras & photo section. [ a hundred bucks and its yours---]

Just buy the D5100 with the 18-55mm zoom lens that comes with it. It will be fine for your needs.