MP4 Files reading as music

I ripped my entire DVD collection to use with my WDTV Live and it worked exactly as expected except for two DVD’s.  For some reason the WD Live has deemed these two files to be music (plays the sound tract, no video).  The two files when viewed on my desktop are fine, but the WD Live seems to think they are music files.  I have reset the WD Live several times and rescanned the library (which is stored on an external HD attached to the WD Live) with the same results.  Any ideas?

Are you saying that they are only visible under the music tab, or that they are shown under the video tab but only play sound?

Sorry for not being clear on that. Yes, they only appear in the music tab.  I have re- ripped the DVD three times with the same results.

Change the extension to m4v.