: Specifies that the video includes the expanded vertical frame seen in IMAX theaters.

: Stands for "Web Download." This means the file was losslessly ripped from a streaming service (like Disney+ or Bravia Core) rather than being transcoded from a Blu-ray disc. It typically offers the highest quality available from a streaming source. Why This Specific Release Matters

The string represents a specific file naming convention used in digital distribution, particularly for high-quality cinematic releases. This version of the 2021 Marvel Studios film is notable for offering the IMAX Enhanced aspect ratio, which provides viewers with up to 26% more picture than standard widescreen versions. The Significance of the IMAX WEB-DL