On wikipedia it says “VOB is based on MPEG-2 Program stream format, but with additional limitations and specifications in the private streams."
Perhaps it would work if you could repackage it.
Try TMPGEnc Free Edition (http://www.tmpgenc.net - after you pick your language, the download button is between “about tmpgenc” and “forum” at the top of the page). Skip the wizard. Click file, MPEG Tools. Merge and Cut tab. Pick MPEG-2 Program. Then add your file and type an output. Then click run. Then try playing the resulting file in your WD (and report back if it works - I was merely taking a shot in the dark; I think it’s worth trying since the program is freeware anyway).
I would like to convert VOB files to AVI, MPEG or another format with minimal quality loss. I recorded these movies using a Canon Camcorder DC410 and want to play these movies using my WD TV. Does anyone have any recommendations for this? Most of the VOB files do not play except one movie. This one movie keeps fast forwarding at certain spots, which does not happen when I play it using Windows Media player. Someone had told me to put .mpg at the end instead of .vob.