I can't watch videos. When I click the picture of the video I want to watch, a window displays a message saying "The page of the video includes a MIME content of an unspecified type. You don't have installed any unit ore module for this type of MIME content, so it can't be shown". What can I do???

tell me pls which computer and OS you have

Mac OS X Version 10.4.11

Ok, your trouble is having the proper codecs to play the WMV videos
You have a solution here:
http://forum.ryoni.com/eve/forums/a/tpc/f/31210571/m/39...?r=99910624#99910624

which includes THIS LINK to download WMP for Mac systems:
http://www.microsoft.com/mac/otherproducts/otherproducts.aspx?pid=windowsmedia

Also there is this other alternative:
http://www.apple.com/downloads/macosx/video/flip4macwmvstudiopro.html

Personally I do recommend you the WMP for Mac systems, bt is up to you

And sure anyone you choose will work for you

Problem solved

Thank you very much your help!!!

Any time!!
we are here to help

and good that the problem is solved