Whether you're a professional, vlogging, or working on any variety of projects, setting the stage for your interviews makes a huge impact. It all comes down to what you're trying to portray in your video. Do you want the background it add context, bring focus to your subject, or add visual interest? These are all creative choice and they can be overwhelming. This video might help you along in make such decisions.
Check it out above and be sure to check out the article on Fstoppers
that goes over all of these concepts in detail HERE