Do not waste energy to create some "aesthetic environment” for your subject. Web video for business is inherently “small screen” so little details are lost or become a visual distraction. Also, complicated backrounds will add a significant lighting complexity that you just don’t need. Place your talking head in front a clean black wall – wall color does not matter. Light the wall to remove shadows from the subject
Don’t concern yourself about the wall lighting being even. In fact, a gradient (hot spots) will create depth. The hot spot left is a desk lamp on the floor. Simple. Cheap. This was shot (with two cameras) in a very small office.