I'm surprised no one has mentioned what khakis actually means in some non-rhotic accents. Non-rhotic accents are ones in which the r sound is only pronounced when it's followed by a vowel (e.g. right); the r is silent elsewhere. Khakis is a humorous pronunciation-spelling of car keys in some areas of the USA (such as Boston). The r is silent because it's followed by a consonant, so it's pronounced KAH-KEEZ which could alternatively be spelt khakis.
Here's an illustration from A Historical Phonology of English by Donka Minkova (p274):
I assume it also means car keys in the quote in the OP:
You are not the car you drive
You are not your fucking khakis! [car keys]
Motion pictures are a comparatively recent invention. Here's how these words evolved:
Film meant a thin coat of something (still does)...
extended by 1845 to the coating of chemical gel on photographic plates. By 1895 this also meant the coating plus the paper or celluloid. Hence "a motion picture" (1905); sense of "film-making as a craft or art" is from 1920.
Movie is a shortened form of 'moving picture'.
By etymology, it looks like these terms are applicable to any video, but conventionally they are reserved for productions released theatrically.
Apart from that you have documentaries, direct-to-video features, TV shows (formally, series) and so on.
Can "movie/film" ever ever be a cover term for everything that is filmed and released in theaters or on TV?
No, it can't.
EDIT: Since people have shown interest in the comments, here are my thoughts on Made-for-TV and Direct-to-DVD features (We're digressing here, as this is not part of English language and usage):
I must say I don't consider them the same as movies.
To back this up, I present a short summary of relevant criteria a production must meet to be called a movie according to the Oscars:
a. feature length (defined as over 40 minutes),
b. publicly exhibited by specified film formats.
c. for paid admission in a commercial motion picture theater in Los
Angeles County, (for our purposes, let's call it any city)
d. for a qualifying run of at least seven consecutive days,
e. advertised ... in a manner customary to industry practice, and
f. within the Awards year deadlines specified in Rule Three. (not
relevant here)
Films that, in any version, receive their first public exhibition
or distribution in any manner other than as a theatrical motion
picture release will not be eligible for Academy Awards in any
category.
Nontheatrical public exhibition or distribution includes but is not
limited to:
These features may be equally great in quality, and eligible for some other prestigious awards, but they are not movies in the classical sense.
Best Answer
What you should realize about the Austin Powers movies that may not be immediately obvious to a non-native speaker is that the character is written by USA natives to be an exaggerated parody of a British guy from the 60's. As such, a lot of his tag lines aren't so much phrases in common use in England, but rather an American's view of phrases in common use in England in the 60's.
The general concept behind the character is that he still has the mentality of a 60's Alpha male from a James-Bond knockoff movie. In his mind the "sexual revolution" has barely begun, women exist purely for his personal gratification, and are probably just waiting for a positive signal of interest in his part to jump his bones. Any attempt to talk to him as an equal, as a modern woman would, he misconstrues as sexual interest.
So you have to keep in mind when watching those movies that in nearly every scene this is a guy who is going to be inappropriately sexual in a (to an American) cartoonishly British 60's way.
Looking at the "Oh behave" in that light, what you should see is a guy who thinks the person he's talking to is making sexual advances, and is basically saying, "Great idea for later, but we have something else we have to take care of here first."