iTunes says more movies are able to sync to iPod than iPhone

I have a 128GB 6 Plus and a 160GB iPod Classic. When I try to add movies to each the iPod shows me 66 movies available, but for my iPhone it says only 24 are available.

Has anyone else seen this? Any way to correct it? It's only for trips but I'd much rather watch a movie on a 5.5" screen vs a 2.5" screen.

Thanks!
Paul