First, can you play the file in Windows Media Player? If not you are
missing the required codec and must purchase it. (It is often refered to as
a DVD decoder.)
If it plays in Windows Media Player then you can convert it to a Windows
format that is compatible with PowerPoint with the use of PFCMedia which can
be downloaded for free (two week trial) from
www.pfcmedia.com
Austin Myers
MS PowerPoint MVP Team
PowerPoint Video and PowerPoint Sound Solutions
www.pfcmedia.com