The Rip Torn/David Alan Grier 1985 comedy Beer about adds = this, light

There's a sadly forgotten satirical comedy Beer (1985) about an add company that creates series of completely fake adds for a brand of beer that feature three "real life heroes" of America. It follows Loretta Swit, the add company's unscrupulous lead designer of totally non-p.c. concepts for these beer adds and three poor slobs (one of them David Alen Grier) who become the intentionally stereotypical leads in these commercials.
http://www.imdb.com/title/tt0088781/reference

The satire is pretty good and appropriately over the top. Swit cares only about success and intentionally creates a series of very sexist (and other kinds of "-ist") beer commercials while toying with the main characters' lives. The three leads are getting deeper and deeper in it and can't connect with real life anymore. The ever increasingly envelop-pushing commercials use racial, gender and ethnic stereotypes to sell bear to other poor slobs and when people protest, the add company only uses it to sell more beer. While the ending is a bit of a cop out and avoids the gut punch that The Network delivers, the TV add satire is still highly effective, nasty and entertaining.

The director of these commercials is played by Rip Torn.

If you want to see a more light and comical, but still very satirical solid mid-bduget movie about the fakeness of TV adds and their impact, give it a shot.