When you export a Windows Live Movie to disk its default settings go out to an MP4 file. Windows Media Player on his computer does not play MP4 files.

If you want to convert MP4 to HEVC / H.265 on your Windows PC, use these free MP4 to HEVC converter software and online tools.

1] Make sure the file format is supported Photos app supports all the major image and video formats. In case you are trying to open image and video formats like .mxf or some other that are ...