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: Right-click the video file, select "Open with," and choose your media player.

: This could refer to the release group or the quality of the encode.

And here’s a full as you might see on a torrent or usenet indexer:

extension), you do not "install" it in the traditional software sense. Instead, you play it using compatible media software:

: Most modern TVs can play this .mkv or .mp4 file directly from a USB drive, though ensure your soundbar or TV supports Dolby Digital 5.1 for the best audio experience.

I notice you're asking to "install" a file named werewolveswithin1080pwebdldd51h264evo and then "make a feature" — but that appears to be a movie file (likely "Werewolves Within," a 2021 comedy horror film).