As the world becomes smaller and smaller thanks to the internet, the scope of sharing contents is so much greater. It is not hard now to download things from the internet via file sharing programs such as eMule or Bittorrent. There are also many generous people sharing videos via online streaming sites such as YouTube or Google Video. Some of these meterials, however, are copyrighted and is therefore illegal.
I chanced upon this website that has a list of movies (among other contents) that have fallen out of copyright and the list of movies available is quite amazing. These movies include classics such as “Un chien andalou” (1929), “Battleship Potemkin” (1925), “Cabinet of Dr. Caligari, The” (1920), “L’âge D’or” (1930), “Metropolis” (1926), “Plan 9 from Outer Space” (1959) etc. If you are interested, here is the link: