This is almost exactly what I do now. :3 My big window at my apartment gives me enough light that I no longer need the light box, and the vertical blinds allow me to control how much light comes in.
Yep! I don't know if it's possible to use my other camera to stream, but I know for a fact that when I start doing stuff for YouTube (lol, right ), I'll be using my normal camera.
(the only thing that you could improve on is perhaps a more *interesting/fancier* title font? ^_^)