I did some testing, and I found that using the older (2005) version of the SEDG/SMP4 codec, Windows Movie Maker doesn’t display SEDG/SMP4 movies in my system either. I re-tested with the 2007 release and it works.
You can download the 2007 version here.
And thanks for the heads up. I updated our SEDG/SMP4 page.
