Why would someone zip a video file? Video files (like .mp4 or .mkv ) are already compressed. However, packagers use ZIP for three reasons:
Assuming you have a legal right to a backup copy or are downloading a fan-edit that is non-commercial: Download - Arrow Season 1.720p.zip
A full 23-episode season in 720p usually fits within a 6GB to 10GB range, making it easier to store on external drives or mobile devices. Why would someone zip a video file
~15–25 GB (depending on encoding quality and audio tracks) Download - Arrow Season 1.720p.zip