He also informed prisoners of Wagner's rules banning alcohol, drugs and "sexual contacts with local women, flora, fauna, men - anything".
Speaking in what appeared to be the penal colony's exercise yard, the mercenary chief also alluded to the difficulties Russia has faced in the protracted conflict, telling prisoners that "this is a hard war, not even close to the likes of Chechnya and the others".
It is unclear who filmed the video, when it occurred or how it was released.
But the BBC has geolocated the footage to a penal colony in Russia's central Mariy El Republic. Analysts did this by conducting a reverse image search on a church visible in the background of the video, which matched to penal colony number six.
A screengrab on the recruiter's face was also run through facial recognition software tools, returning a positive match of between 71% and 75% with an actual photo of Mr Prigozhin.