I added a macromedia flash animation (swf) to my asp.net website and it would work fine but when it came to display video it would stop. I figured it had to do with the video files i.e. the FLV file. It turns out that I had to add its MIME type to IIS
- Right-click your site and click properties
- Click HTTP Headers tab and click MIME Types
- Add the extension .flv and type video/x-flv
- Click OK to close all windows
- You are done. Your FLV files should work fine now.