Video File Opens as Text on XP with SP2
After following a hyperlink to content such as a WMV or RealPlayer video file in Internet Explorer it is opened as text in the browser rather than Media Player.
This will occur if Internet Explorer is not set to open a file based on its actual content and uses the incorrect content type identifier sent by the server. Although its more secure to have this turned off it can cause some problems with content that is not correctly identified.
To allow files to be opened based on content:
In Internet Explorer open Tools > Internet Options, Security Tab.
Select the ‘Internet Zone’ and click the custom level button.
Scroll down to ‘Open file based on its content, rather than file extension’ and be sure this is enabled.