Wikipedia notes that "MPEG-4 Part 14 or MP4 is a digital multimedia container format most commonly used to store video and audio,"
Thus, the encoding that VP created, unlike that of the other software, may not be supported by the BR DVD player.
Right-click on a file that plays on the DVD. Click PROPERTIES|DETAILS|VIDEO and see if you can spot the encoding used. Or use this tool.
Then, In VP, export with THAT encoding, or simply test the other choice that's offered when the ENCODING OPTIONS box is clicked.
Also try MPG (DVD standard) file format.
