Files ending in .mkv from sites like the one in your query are usually: They violate copyright laws.
Rather than using risky "HQ" or "mkv" file-sharing sites which often contain malware or low-quality rips, you can stream the movie in high quality on official platforms:
Since this is a popular South Indian film that was later dubbed into Hindi,
These sites are notorious for pop-up ads and hidden scripts that can install malware on your device.