the black background is automatic when you are in the album view mode. It's the middle button, or you can change modes by using the view menu in the toolbar.
I've always wished this kind of view was an option outside of just the movies section. To be able to view CD album covers in this way under music or even TV shows grouped together until you choose to expand them. My biggest complaint is the lack of ability to truly customize how videos are grouped and viewed. You have 3 choices - movie, tv show, or music video. I have quite a few that are none of the above, but I just classify as movie since they're videos.
For instance, I have every US and UK "get a mac" ad in hi def added to iTunes, as well as the Japanese ones (sadly not hi def at all). Categorized as movies, this really adds a lot of unneeded fluff to scroll through when looking for something. It's also a lot of white on that pretty black background. lol
</rant>