Here is where the "Web" tag becomes critical. Kill Bill: Vol. 1 has received several Blu-ray releases, but almost all of them are the 2.35:1 theatrical version. The Blu-ray is sharp, colorful, but cropped.
The Open Matte 1080p Web version appears to have leaked from early streaming providers (like Amazon Prime or international Hulu clones circa 2010-2014). These services, eager to fill a 16:9 screen without letterboxing (black bars), requested the Open Matte masters directly from Miramax/Lionsgate. Kill Bill - Vol 1 -2003- OPEN MATTE -1080p Web-...
Key Characteristics of this specific file: Here is where the "Web" tag becomes critical
Most modern films are presented in a widescreen aspect ratio (usually 2.35:1 for Kill Bill). An "Open Matte" print reveals the full height of the original camera negative. It is called "Open Matte" because the matte (the black bars top and bottom) has been "opened up" to show more image than the director originally framed for the theatrical release. The Blu-ray is sharp, colorful, but cropped
For Kill Bill Vol. 1, the Open Matte version typically presents the film in 1.78:1 (16:9) — meaning it fills your entire TV screen with no black bars.
Tarantino is a purist for 2.35:1 'Scope. The Open Matte is not his approved framing. In fact, you will occasionally see a microphone boom or the edge of a set. However, for cinematography nerds, it’s a treasure trove. You get to see exactly how Robert Richardson lit the frame outside the theatrical crop.