Don’t have the cash for an expensive set of lights? Here’s a way to light your video or photos that is quite affordable: Window light and a reflector. All you need to buy is a reflector if you don’t already have one. And not only is it a cheap approach, sometimes it is the right look. The key here is to use a window with indirect light coming through and use the silver side of a reflector to bounce light into the unlit side of your talent—can be a great look and very affordable. The white side of the reflector doesn't seem to bounce enough light back at your talent in this case and direct light through a window will be a lot higher contrast and can be harder to balance out—may end up with blown out highlights.
http://youtu.be/BAeKw8wTCkE