Then just replace 03:00:18 with 00:30:18 in any tool.
The string typically refers to a specific technical configuration or a metadata tag for a video file, likely a portable, English-subtitled (engsub) version of a media project. Based on common file-naming conventions and available technical references, Technical Breakdown nxg501engsub convert030018 min portable
engineering (eng) substitute (sub) course or module (nxg501) that has been 300-word (0300) 18-minute (18 min) Then just replace 03:00:18 with 00:30:18 in any tool