It may refer to the "paper" insert or cover art (slipcover) associated with the physical Blu-ray release of the movie .
The video resolution (1280x720 pixels), which is standard high definition. Lone Wolf McQuade (1983) [720p] [BluRay] [YTS.MX]
In some digital sharing communities, "paper" is an infrequent tag used to denote a specific release group or a "paper-thin" highly compressed file (though this is not a standard industry term like "BluRay" or "720p"). It may refer to the "paper" insert or
The title and release year of the film directed by Steve Carver. Lone Wolf McQuade (1983) [720p] [BluRay] [YTS.MX]
The name of the group or website that encoded and released this specific version of the file.