Where can I find this video?

Found it on tumblr, got interested in the scenes before this part and they build up for the husband/voyeur appearing behind the window.

Edit: Yandex allowed me to discover the name of two of the male performers, Jörg Joppke is the guy behind the window and Antonio Ross is the guy behind the actress, however still can't find movie link or title.

Update 30/12: Found another version of this gif with a watermark from Private, however their site isn't very searchable.