In short, while The Escape is not an official exclusive to OK.ru, the platform is a primary source for users to watch and share the film online. The "exclusive" tag in your search likely refers to a unique, user-uploaded copy found there.
When navigating to OKRU, ensure you have an ad-blocker enabled. While the platform is legitimate, its associated ad network can be intrusive. Look for the video with the green "Exclusive" badge next to the timestamp. i the escape aka de ontsnapping 2015 okru exclusive
OKRU Exclusive