Its possible the end video is being rendered in a location you are
not aware of. Restart your system and in the Render As dialogue box,
make sure the Output File folder location is set to your Desktop.
Steve Rhoden (Cow Leader)
Film Maker & VFX Artist.
Owner of Filmex Creative Media.
Samples of my Work and Company can be seen here:
https://www.facebook.com/FilmexCreativeMedia