This is a (year-month-day) format, widely used in Scene releases to indicate when the content was captured from the source. 111017 breaks down to:
If you downloaded it from a torrent site or Usenet, be cautious. Video files can contain exploits (e.g., malformed AVI headers), but these are rare nowadays. Use VLC, which is sandboxed more heavily than built‑in players. -XTM- 2 .E01.111017.HDTV.XviD-WS.avi