The string is a highly descriptive file name used in digital media circles to specify the exact technical qualities and origins of a movie file. Technical Breakdown of the Label

Each segment of this title provides specific information about the video and audio quality:

: Indicates that English Subtitles are embedded or included with the file.

: Indicates this version includes the expanded aspect ratio (typically 1.90:1) used in IMAX theaters. This provides up to 26% more picture by removing the black bars found in standard widescreen (2.39:1) releases.

: Identifies the high-definition source of the rip—a physical Blu-ray disc —ensuring higher bitrates than standard streaming rips.

: Likely a tag from the specific distribution site (Vegamovies) or the specific uploader who converted the file to the MKV (Matroska) container format. Film Overview: Black Panther (2018)

: Short for "Original Dual Audio." This usually means the file includes the original English audio track plus a secondary dubbed language (often Hindi in the context of sites like Vegamovies).