Many free movie download sites are available on the internet, but not all are secure. When you download a movie from a free movie download site, you could be downloading malware or viruses along with the movie. To stay safe, only download movies from reputable sources. If you're unsure if a site is reputable, do a quick search online to see if other people have had good experiences with it. When in doubt, it's always better to err on the side of caution.