Open vlc, click the View->"Stream and media info" menu item...
Then open the file and it'll tell you what it is.
The S&M info from that file playing on VLC:
Stream 0
Codec: mpga
Language:
Type: Audio
Stream 1
Codec: mpgv
Language:
Type: Video
Stream 2
Codec: a52
Language:
Type: Audio
General
Duration: 1:01:10
Stream 3
Codec: spu
Language:
Type: Subtitle
Stream 4
Codec: spu
Language:
Type: Subtitle
Stream 5
Codec: mpga
Language:
Type: Audio
Stream 6
Codec: mpga
Language:
Type: Audio
Stream 7
Codec: mpga
Language:
Type: Audio
The type mpgv seems to be the video part. So, should the proper extension for that file be mpg or mpgv?
And I realize VLC doesn’t have a hot-spot function so that you can click on the menus, but is there a program that does? Or is there any way to make these options available while playing the file with VLC?