Clevo

I don;t think it's a copyright problem as you would get an instant response rather than the writer going through the motions.

I suspect it's a video compatability issue or a video file corruption. quite often video files play OK even with a corruption but when it comes time to author or convert you could run into problems.

I work with a lot of video files but I have never used media centre to do the work. I tend to rely on third party programs.

Mpegs are generally problematic because of all the different codec used for compressions.