Conversion of vghd files to mp4 file format

It appears that VGHD files are exclusively used in VirtuaGirlHD and the format is proprietary and encrypted, so it is unlikely that some video converter can be used for the purpose of vghd to mp4 conversion, i.e. export to MPEG-4 format). You can try to use screen recording software to capture the model when played using the VirtuaGirlHD, but that's pretty much poor man's solution.

Open VGHD file    Open MP4 file