I have an IIS 6.1 website on a local Windows 7 32-bit machine that serves HTML and MP4 videos through Internet Explorer all on the local machine. An internet connection is not required as this is all local storage and local hosting via IIS. IIS is configured to serve the MP4 videos as downloadable files, not streaming in any way. I do have the proper MIME type ".mp4" with "video/mp4" setup in the IIS server, so I do not believe that is the problem.
When the machine is connected to the internet, clicking an MP4 video link in any HTML page served by the local IIS server results in Windows Media Player opening up and playing the video in its own window. However, when the Ethernet cable is unplugged, clicking the same MP4 video link results in Windows Media Player opening its own window, then displaying this error message:
Windows Media Player cannot play the file. If the file is located on the Internet, connect to the Internet. If the file is located on a removable storage card, insert the storage card.
It is almost as if Windows Media Player has a bug and since it is accessing this media file via a URL but the machine is not connected to a network, it thinks this file is unplayable.
When the Ethernet cable is disconnected, the local IIS server still serves all the HTML and ActiveX content except for media files. I also tried to access MP3 and WMV files through the IIS server to see if Windows Media Player would open those when the machine is disconnected from the Internet. Those files also caused Windows Media Player to display the same error message.
I tested VLC player (VideoLAN) after changing file extension ownership to VLC from WMP for .mp4 files. With VLC installed and extension ownership changed to VLS, I can download/open the MP4 video using the link in the web page served by IIS all while disconnected from the internet. The only thing I cannot do is get VLC player to open up and play the video simply by clicking the link in the Internet explorer web pages served up by the local IIS server.
I would like to make use of Internet Explorer and Windows Media Player with this IIS server serving MP4 videos rather than use VLC player.