: Indicates the source of the video was a commercial Blu-ray disc.
If you are trying to find an actual article about the film's production or its technical restoration for Blu-ray, I can certainly find those for you. (CM) Top Gun (1986) BluRay 720p.mp4
: Likely a tag for the release group or uploader (e.g., "Cinema Master" or a similar pirate/archival group). : Indicates the source of the video was