Files with .ismv extension use the Smooth Streaming fragmented MPEG-4 format by Microsoft. Try opening the file with Microsoft media software. Some files require elevated access rights. Verify account...
Files with .ismv extension use the Smooth Streaming fragmented MPEG-4 format by Microsoft. Try opening the file with Microsoft media software. Some files require elevated access rights. Verify account has required privileges to open the file. Plugins add .ismv file support in web browsers. Use Microsoft tools for easiest option. There are problems converting .ismv files. Some had luck with Movie Maker. Others not.
The format allows encryption and DRM protection. Streaming occurs over HTTP with variable rates. IIS servers host multiple quality .ismv files. Double-click the file to open it. The OS associates the file and program to open automatically. If program installed, file should open. Verify Microsoft IIS installed first. Then retry opening.
The file format bases on MPEG-4 and Microsoft standard for delivery. It stores in smaller fragments for easy streaming without distortions. Files can encrypt in Expression Encoder. Some convert to MP4 with mp4split. But there are known conversion problems.
Microsoft IIS
VLC Media Player