Purchased copy of powerdvd 14 or 15 with process monitor will display all playlist info being played including m2ts and mpls. We use this tool to figure out screen pass protected disks but it can easily be used to determine if a theater version or uncut version (extended) is being played at a specific time.
This gets more advanced when dealing with cashed mpls files but 99 percent of the movies or TV shows on the disk will work.