A soloist.
One who performs alone is a soloist.
Sail by awolnation is the name of the song that a person dances in the web address provided in the question.
A person who desires to live alone is often referred to as a "solitary" or a "recluse."
A person living alone could be:a hermita reclusean introvertantisocialin solitarymaroonedlonelyantisocial
Troglodyte
Leave this person alone.
== == == == Necrophiliac.
There does not appear to be a name for it.
A Nickname.
Genevieve gurulis is a lady that dances in the a backyard like no other person would dance like. This person has one friend. Her name is Cassie.
A portrait ...
nope