The titular 'Spaceballs' are a bunch of unscrupulous nutjobs, intent on stealing the air of the beautiful world of druidia to save their own over used homeworld. To this end they capture a druish princess (An extremly light jewish gag that is carried on through the film) who can only be rescued by a space bum called Lone Star and his scruffy man dog pal, Barf! But the evil Dark Helmet is not easily defeated....
Puerile and fun, this purports to be a Star Wars Spoof, but pulls in many other sources along the way including Alien (Complete with John Hurt!) and Star Trek.
Trailers
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This is basicaly the second trailer, but with a voice-over announcer mentioning the movie's imminent theatrical release.
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This is a TV teaser for the movie.
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This TV spot was originally posted to YouTube by Burninschit.
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Found on a DVD copy of Spaceballs.
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Originally posted to YouTube by moviesnotseen, this is a trailer for the Special Edition DVD release of the movie.
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Originally posted to YouTube by EIMuvimaiker, this is basically the same as trailer 4, only with an introduction by Mel Brooks.