Learn how to get free Redbox DVD rentals. Redbox movies can be found in large stores, usually supermarkets, where you can rent a movie, and return them to the same box when you are done. In order to get the free movie, you must obtain a code, which you will enter during the rental process. On the website, sign up for what is called "Free Movie Monday". Redbox will send a code to your cell phone on the first Monday of every month. One thing to remember is to not be late returning the movie, or you will be charged a late fee. Watch this quick tutorial and you will be able to enjoy free movies with no hassle.