An idiotic PSA comparing pirating a 1 GB movie file and stealing a full blown $50k+ 2 ton vehicle. The phrase was a part of an anti-piracy campaign called "Piracy, It's a Crime" created by Motion Picture Association. The PSA paints piracy as a bad thing even though it helps people living in 3rd world countries, aids developers test out software, and opens artists up to a whole new world of software.

"You wouldn't download a car" is a common variant of the phrase, originally created by Reddit user augreeko on /r/funny.
you wouldn't steal a car
you wouldn’t steal a handbag
you wouldn’t steal a television
you wouldn’t steal a movie

Downloading pirated films is stealing,
stealing is against the law,
by DisgustingWeebs February 20, 2017