As with all occupations Film makers use JARGON. You need to familiarise yourself with the terms used.
TOP TIP:Watch the credits! Some films even make it worth your while e.g Ferris Bueller's Day Off .

These 'extra bits' were the precursor to the Easter Eggs found on DVD's. (Do you know of any films that reward those who watch the credits?)
In the mean time click on the comments below to update yourself with Film Terms.