If you are recording a person or object, and they are the main focus of the clip, then make sure their background never overpowers them. It is great to find a colorful, and detailed backdrop for them to be in front of, but do not make it more interesting than the subject. In a similar fashion, never allow text into the background unless that text is meant to be read. The audience will always read text if it is legible, so avoid things like wall signs at all costs. Black backgrounds are a difficult choice, so you have to make sure it is motivated in your digital video imaging.