It's 'unlisted' for some reason, I guess 'cuz Bey does what Bey wants. 
idk there was even such a thing as unlisted videos. does that just mean that they don't come up in searches and you can only find them if someone shares it? that seems kinda dumb to me
yep - well, it's for people who upload personal videos (family videos for example) or similar things that they don't want public but they want to share with certain people. it's easier to share a personal video with someone that way than over, say, Facebook or something similar.