This looks like a personally renamed video file from an adult DVD/Blu-ray rip, where the user added “engsub” to indicate subtitles and “Convert02-00-18 Min” as a note about editing/encoding.
The final step is putting it all together into a new file. This involves syncing the video, audio, and subtitles. WAAA-448-engsub Convert02-00-18 Min
Based on the title provided, this appears to be a segment or a specific timestamp from a Japanese adult video (JAV) title, specifically from the series produced by the studio Wanz Factory . Content Overview Series/ID : WAAA-448 This looks like a personally renamed video file