Music videos missing from iPad Music app but present on Mac

I have an odd situation. I purchased (over time) 30 Music Videos through the iTunes Store. I recently added 3 move videos that from another source. In the Music application on my Mac it shows 33 videos, and they all play. But when I open the Music app on my iPad the three new videos are not there. It only shows 30. So, why would the 3 be missing from my iPad but not on my Mac?