This is likely a "tag" or shorthand for the uploader or the website (in this case, SkymoviesHD). (2003): The release year of the film.

The source. This means the file was encoded from a high-definition digital stream (like a web broadcast).

Movie filenames are packed with technical shorthand to tell you about the quality, language, and source.

The resolution. This is Full High Definition (1920 x 1080 pixels).

The file container. MKV (Matroska) is popular because it can hold multiple audio tracks and subtitle files in one package. 🛡️ Safety & Legal Tips