Disable backdrop in video content WP Media Hub?

A person could, instead of loading a different theme, just create a simple 720 x 405  (16:9)  jpg image in just about any photo editing program then assign that as the hub’s background image via setup. The image could be all black, or perhaps all medium-grey, or whatever you liked. Or it could be like mine, a photo I like, but edited to be a very dark, low contrast pic that  doesn’t compete with or overpower the interface but gives the background a little texture.