A free movie download can be gotten legally through a good many channels. That means that the download of the movie is free but not the site in general. Most often you will see that many of the sites that offer the free movie download do so by offering unlimited downloading for a flat monthly fee. This is opposed to the sites that charge per download and allow for you to rack up quite the large bill in the meantime. This is truly the only legal way to get a free movie download because the sites are required to pay a certain percentage of the money they take in to royalties. So that way they do not violate the many copyright laws that govern the whole movie industry.
There is a set fee for the free movie download sites and you can manage to get some of the sites for free if you know what you are doing. Many of these places will offer the first month for free and then require you to pay from there on out. So if you can manage to get all of the movies that you want in the first month then cancel the subscription then you will actually have gotten a free movie download. Not all of the sites allow for this though. Many of them have minimum times that you must be a member to get the free month. You should read all of the fine print before signing up for anything.