Hi,
If your computer recognises the files on the disc then you're halfway there. Try using this free program to see if it'll play the movie ( it's much better than Windows Media player)
There's a couple of ways to play a disc. Assuming the disc is in the drive, open vlc choose file and open disc in device name field select the letter of your dvd drive (usually d: but not always ) and click ok.
Second way open My Computer and right click the disc, select Open with VLC media player.