Thank you! But Filmregisseur seems to mean Film Director but it's ok to use. What does Filmreagien mean anyway?
'Filmreagien' isn't a word

. At least not in german.
I'm sure your teacher meant 'Filmregisseur' or maybe 'Filmregie'.
I've found some websites with 'Filmregie' but never heard someone saying it. Stay with 'Filmproduzent' as suggested before.
BTW: www.leo.org can be your best friend when trying to learn german

.