iTunes Library shows zero TV Shows & Movies

iTunes (version 12.9.2.5) on my iMac (Mojave 10.14.3) shows zero TV Shows & Movies when I select TV Shows & Movies from the Sidebar, although I have many - some purchased from iTunes, most imported from DVDs. My 1,043 Music Videos show up as expected when I select Music Videos from the Sidebar. My Smart Playlist showing all "Videos MPEG-4" displays 1,133 videos properly.

Strangely, my Apple TV [4k, A1842 tv OS 12.1.2 (16K534)] shows all of my Movies, TV Shows, Home Video, etc. Everything seems fine from the Apple TV. iTunes on my iMac also seems to have no way to display my Home Video files?

One example problem is, I just imported a new Home Video file. Yet, the only place I can view it is in the Smart Playlist for all Video MPEG-4 files. It is a duplicate file, so I want to delete it. But there is nowhere to delete this file since none of the Library selections in the Sidebar displays my Home Video files, or TV Shows, or Movies. Only the Music Videos can be displayed. See screenshots.