This is indeed strange. I just checked on the PS4 app and the movies show up, but when you try to load one, an error message comes up saying that they are "not available."
I'll check with the admins and tech support. Hopefully we should be able to get to the bottom of this.
UPDATE: Just checked in with @FunimationHelp and got this response:
"At the request of the licensor, the Dragon Ball Z movies are unavailable at this time. We apologize for the inconvenience."