Want to watch movies for free?
Internet Archive has public domain films you can watch on site, and downloadable files you can transfer to disc and watch at home.
This great site offers a wide variety of films, from silent shorts starring comedy greats Charlie Chaplin and Stan Laurel, to feature films such as Robert Wiene's Cabinet of Dr. Caligari 1919 and Michael Reeves The She Beast 1966. Just a few examples of the diverse offerings silent film fans can sample are; a very nice print of Last of the Mohicans 1920, Murnau's Nosferatu 1922, and cowboy star Bob Custer in Arizona Days 1928. Pre-code film fans can see Mary Brian, Irene Rich, and Noel Francis in Manhattan Tower 1932, the beautiful ice cream blonde Thelma Todd in Klondike 1932, Monte Blue and Natalie Moorhead in The Stoker 1932, Preston Foster, Arline Judge, and Kenneth MacKenna in the entertaining low budget tale Sensation Hunters 1933, a young Lon Chaney Jr.(billed as Creighton, doing comedy, and showing off a fine physique!) and Eddie Nugent in Girl O'My Dreams 1934, Victor McLaglen larger than life in Laughing at Life 1933, Evelyn Brent and Pat O'Brien in the not too bad The World Gone Mad 1933, Bette Davis and Pat O'Brien in Hells House 1932, and scene stealing Roland Young with Lillian Gish in His Double Life 1933. Sherlock Holmes fans can download The Sign of Four 1932, and Murder at the Baskervilles 1937 both starring Arthur Wontner, A Study in Scarlet 1933 with Reginald Owen, Sherlock Holmes and the Secret Weapon 1943, and Terror by Night 1946, both featuring Basil Rathbone. The classics are also well represented and include Fritz Lang's M 1931, Things to Come 1936, My Man Godfrey 1936, the animated Gulliver's Travels 1939, His Girl Friday 1940, The Quiet One 1948, Robert Rossen's Mambo 1954, and Romero's Night of the Living Dead 1968.
Most of the Mpeg-1 and Mpeg -2 files are anywhere from 200MB to 3GB in size. Downloading a 700 MB file @ 100 kbs takes me approximately 2 hours, and a 2.5 GB file at 100kbs takes me around 8 hrs.
There is an occasional corrupted file, but the majority I've downloaded are just fine.
These films are in the public domain, free and legal to download.
However, If you're expecting uncut pristine quality films, these prints may not be to your liking, and retail outlets would probably be your best source.