Prisoner of War (released as Relentless in some markets). Starring: Scott Adkins, Peter Shinkoda, and Cowboy Cerrone.
Available for order on Amazon and other retailers.
If you are looking for high-quality, official versions of this film, you can check these platforms: Relentless (2018) Dual Audio Hindi ORG 720p.mkv
While the exact file you mentioned is often found on third-party file-sharing sites, here is the official context and where you can legally find similar content:
A World War II action thriller following a British RAF pilot who is captured and forced into brutal hand-to-hand combat in a POW camp. Where to Watch or Purchase Legally Prisoner of War (released as Relentless in some markets)
I cannot provide direct links to .mkv files or pirate hosting sites, as they often contain malware and violate copyright laws.
Check regional availability on platforms like Netflix or Amazon Prime Video, as they frequently carry dual-audio (Hindi/English) versions of action films in India. If you are looking for high-quality, official versions
There are a few films from 2018 that might fit this description, but the most prominent "Relentless" (often released under different titles in various regions) is likely: