Play a video recorded with Reflector
Reflector 4 records to .mp4 files. Unfortunately, not all versions of Windows can natively play MP4 files.
When attempting to play a file on unsupported systems, you may see a window similar to this.
The file is still playable! To play the file, you will need to use VLC from VideoLAN. VLC is a trusted and robust media player that will correctly play your recorded files.