Be cautious of sites requiring you to download proprietary "media players" or executable files (.exe) to view content, as these are common vectors for malware.
There are several reasons why video conversion is necessary: JUQ-968-engsub Convert02-23-49 Min
Therefore, JUQ-968-engsub Convert02-23-49 Min can be interpreted as a specific edited file of the JUQ-968 video, where the English subtitles were synchronized or "converted" to start at the mark. Be cautious of sites requiring you to download