The word "work" is ambiguous and could be a remnant of a larger string such as:
Older TV rips often paired Xvid video with an MP3 VBR (Variable Bitrate) or AC3 audio track, which causes modern players to lose synchronization.
Before Netflix and Hulu, there was a different world. It was a world of torrent trackers, slow downloads, and codec packs. Groups like XTM were the digital warriors of that era, taking HDTV broadcasts that most people couldn't access and shrinking them down with the XviD codec into files you could actually download on an average internet connection.