Our Earthmen Friends is a French movie released in April 2007 and produced by Claude Lelouch.
It has been adapted from the play written by Bernard Werber

Bernard Werber

Bernard Werber is a French science fiction writer active since the 1990s.-Novels:His style of writing mixes different literary genres, notably the saga, the science fiction of the inter-war years, and tracts of philosophy.In most of his novels, Bernard Werber uses the same form of construction,...

Nos Amis Les Humains.

Plot

The movie is shot as if extraterrestrials were making a documentary about humans. A voice-over gives the analysis of the extraterrestrials. This external point of view allows to analyze the human behavior. The aim is to make the beholder think about his condition of human being.
Two couples are studied: the husband of the first couple and the wife of the second are trapped into an invisible cage while the two others are studied in their environment.

Extraterrestrials are doing experiments on the two prisoners.