Good question, man.
I think as a student, it is your objective to be called in for interviews right? So you don’t want to give it all away. The goal should be to pique intrest enough for the viewer to say “OK. I’ve seen enough to fly this guy out here and see what else he has to say”.
I do think you might want to show more projects than a coroflot folio will alow, but it might not be neccessary.