Such filters are mostly done before you play it. That is, someone watches it and bleeps or edits it before it's played.
Guys!!Do you know of a software that automatically filters words....For example ..I downloaded a movie and played it in my vlc or any other players when a person curses it automatically mute that word.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic