I'm moving our post to an off topic forum folder that I have access to. You posted to a forum for Live Mesh - www.mesh.com - which has nothing to do with your problem.
You can try this discussion group for help:
http://www.microsoft.com/communities/newsgroups/en-us/default.aspx?dg=microsoft.public.windowsmedia&cat=en_US_3c490c72-ee5e-4661-8ac5-558db34a117d&lang=en&cr=US
Or post to one of the forums here, depending on your operating system:
Vista: http://social.answers.microsoft.com/Forums/en-US/category/windowsvista
XP: http://social.answers.microsoft.com/Forums/en-US/category/windowsxp
Wherever you do post your question, be sure to provide as much information as possible for people to be able to help you such as the operating system you are using, what program you are trying to use to play the videos, and what type of files you are trying to play.
-steve
~ Microsoft MVP Windows Live ~ Windows Live OneCare| Live Mesh|MS Security Essentials Forums Moderator ~