The copyright for George Romero's classic zombie movie "Night of the Living Dead" has expired, putting the movie into the public domain. That means you can now legally download your own copy, free.
"The Internet Archive" http://archive.org is a non-profit service that collects public domain movies, TV programming, books and music, and makes it available to the public to view, or to download for your own use. They have posted "Night of the Living Dead" on their site in several formats...watch on line, download to your computer, or download and burn onto a DVD to watch on your TV. Here's a link to the burn to DVD option: http://archive.org/details/night_of_the_living_dead_dvd
The site has a wealth of other zombie genre materials, including other old movies and some hilarious student projects. It's well worth a little browsing time.