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Fair Use Doctrine for the movie Firm Fat Blasting Cardio: DVD Rentz is an online retailer and legal owner of the physical copies of movies sold, rented and exchanged on its various websites. The promotion and advertisement of movies, such as the film Firm Fat Blasting Cardio, through the display of copies of box covers, including titles, actors names, producers, and the use of excerpts, synopses and previews of DVD films and videos such as Firm Fat Blasting Cardio Video is protected under the "fair use doctrine". 17 U.S.C. § 107 and the First Amendment. The "fair use doctrine" is grounded in the First Amendment rights to free speech and permits DVD Rentz to use trademark and copyright materials, without the owners' permission, in a equitable and fair manner. The "fair use doctrine" serves the public interest in the reception and dissemination of information, in order to assist the consuming public in finding purchasing and/or renting authentic product such as the movie Firm Fat Blasting Cardio.