Street Games 1996 one on netflix

The protagonists of the film are two employees of a private television station. Janek is a journalist and Witek is a cameraman. Their specialty is hot, sensational topics. They are just working out the case of a gang, dealing in explosives. One day someone tosses them a tape from which they learn that a well-known politician named Makowski was a UB agent with the alias Ketman in the 1970s.