This is a name for the 1974 disaster film Earthquake . Since you cannot "develop" a video file, you are likely looking for one of the following technical guides.

The filename includes -PublicHD- (an obsolete tracker tag) and scene group GECKOS . Modern scrapers fail on extra dashes and tags.

Earthquake.1974.720p.BluRay.x264-GECKOS -PublicHD-

Please choose the guide that matches your goal: Goal: Add this file to Plex, Jellyfin, or Emby correctly.

x264 (H.264), 720p , likely ~4-6 GB. To develop a smaller version using FFmpeg:

ffmpeg -i "Earthquake.1974.720p.BluRay.x264-GECKOS.mkv" \ -c:v libx265 -crf 24 -preset medium \ -c:a aac -b:a 128k \ "Earthquake.1974.720p.HEVC.mkv" Goal: Extract the built-in subtitles or add new ones.