For the aspect (which we will explore later), a BluRay source is non-negotiable. If you are editing clips, creating fan trailers, or pulling stills for review work, you need the high bitrate. Compressed web-rips introduce artifacts and banding in the dark scenes (like the basement tavern shootout), making them unusable for professional work.
The phrase "dual audio bluray 4 work" typically refers to a specific type of digital media file: inglourious basterds 2009 dual audio bluray 4 work