This stands for "Web Download." It indicates the source of the video file. A WEB-DL file is losslessly ripped from a legitimate online streaming service (such as Netflix, Amazon Prime, or Disney+) without re-encoding the video stream. This generally results in better visual quality than a "WEBRip," which captures the video stream as it plays.
Here is a comprehensive breakdown of what this keyword means, the technology behind it, and what users look for when utilizing these specific search parameters. Deconstructing the Keyword Download DDRMovies Mobi English WEB DL 480p -1- Mkv
This is a typical naming convention used by release groups or uploaders to track file versions, parts, or specific encoding batches. This stands for "Web Download