JakeBenson saidFunny from experimenting I ended up getting 2 out of 3 correct. I had lights about 20-45 degrees on both sides from the camera, but both were dim, and had no backlight. Thanks for the suggestion though. I'll do that for the next video!
When I studied lighting for theatre and television (I have college degrees in both fields), we used to say we were "painting with light." I still use that concept in interior design, as well.
Light can help you to look more crazy, if that's what you want, more mysterious, more lovely, more anything. Bad lighting can distract from yourself, and obscure visual information you want your audience to see.
In TV, you generally want key light, fill light, and back light. The color temperature needs to be considered because of the way the camera reacts to it, unless you deliberately use color gels for effect as in theatre lighting. But then you must have a video camera with manual color controls, or it will attempt to auto-compensate, always shifting to a color balance that makes white values as true as possible.
Lighting's a real art, too complex for a full discussion here, so I'd suggest finding a library book on the topic. And getting in touch with someone who's done professional stage & studio lighting for some tips.