If you’ve had time to check out iTunes 12, you may have noticed something missing. In iTunes 11, when you selected your Music library, the navigation bar at the top of the window included a button to access your music videos. In iTunes 12, there is no such button:
It’s odd, but, while there is a way to view your music videos, it’s well hidden. To see them, select the Music library, as I’ve done above, then click Playlists, to show the iTunes Playlists sidebar. Only then can you see your Music Videos library:
I wonder if this is a bug, or if someone simply forgot to add a button for the Music Videos library in the navigation bar…