The “dancer” is some dude who apparently travels the world, making these types of videos from various unique locations (I found one where he’s dancing at Toronto’s Pearson International Airport).
The video was shot in Christiania, Copenhagen, a city/commune founded in 1971 when a group of hippies took over an area of abandoned military barracks and developed their own set of rules, completely independent of the Danish government. Christiania has been described as a life surrounded by art. There is art everywhere. Christiania is an alternative society within society, plenty of weed/hash and music. The freetown in the heart of Copenhagen has always been known for its human diversity, but also that the independent community was a place where hash was sold openly on Pusher Street; but in 2004 the Danish government succeeded in closing the permanent stands. The battle of “independence” and the Danish Government continues up to today.

Arthur Lee (March 7, 1945 – August 3, 2006) was the frontman, songwriter and multi-instrumentalist of the Los Angeles rock band LOVE. "7 and 7 Is" was written by Arthur Lee and recorded on June 20,1966. The song took a great deal of work to record with Love's drummer, Alban "Snoopy" Pfisterer, being unable to cope with its frantic demands after 30 takes or so and being replaced on drums by Arthur Lee himself. The song climaxes in an apocalyptic explosion - the supposed sound of an atom bomb - before a peaceful conclusion.
The song was inspired from Arthur Lee's high school sweetheart, who - as Arthur Lee himself - was born on the 7th of March. It also describes Lee's frustration at teenage life - the reference to "in my lonely room I'd sit, my mind in an ice cream cone" being to wearing (in reality or metaphorically) a dunce's cap.
The song was released as the A-side of Elektra single 45605 (c/w "No. Fourteen", the 'answer' to the half-sentence formed by the A-side) in July, 1966 and made the Billboard Pop Singles on July 30, 1966, peaking at number 33 in a ten week stay and becoming the bands only hit single. Described as "proto-punk", it was later covered by numerous bands, most notably the Ramones, Alice Cooper, and Rush, as well as a re-recording by Lee himself. (Wikipedia)