Ain't used one yet myself, but I'm 99% sure they aren't one-use hold items. That'd be nonsense, even if they're easy t' get more of at any point in the game.
Pokestar Studios was a bunch'a bullshit. But this PR video studio thing, Troll Freak clearly put some effort into. Ain't my cup'a joe, but I'd imagine it is for many others. T'is what Pokestar Studios should'a been.