Well if the 5 min move is 13 GB perhaps you'd want to use some form of compression? A 1024x768 5 minute movie can easily be packed into 500mb at a HUGE quality (crystal quality actually).
For such compressions I'd use DivX 6. I think there's a 15 day trial available for free.
EDIT: I can't watch the damn thing. Gametrailers is so slow for me
