Indicates the video quality is High Definition (1080p) sourced from a Blu-ray disc.

Downloading files from unofficial sources like the one in your query carries risks, including malware, phishing, or legal issues. Since the movie is a major release, you can find it easily on official platforms:

Check services like Netflix , Hulu , or Paramount+ , as licensing changes frequently.

Available in 4K or HD on Amazon Prime Video , Apple TV , Google Play , and Vudu .

These are tags for the specific group or website that uploaded or encoded the file. MKV: The file container format (Matroska Video). How to Watch "Patriots Day" Safely

The 2016 film starring Mark Wahlberg about the Boston Marathon bombing.

If you're trying to play an MKV file you already have and it won’t open, I recommend using VLC Media Player . It’s free, safe, and plays almost any file format without needing extra codecs.

Usually means it includes the "Original" or untouched audio track.