I should also mention that the BluRay version (even in 1080p) might offer better picture and sound quality than standard DVD releases, which could be a point of interest. However, the 1.8GB size is a bit low for a 1080p BluRay rip, as typically they are larger, but maybe it's a dual-layer disc or the encoding is optimized. Maybe the user is aware of this or it's just part of their filename convention.