From the official Star Wars Youtube channel:
This Star Wars trailer is for a limited two-week re-release of the film on April 10, 1981. This re-release was historic, as it would mark the first appearance of "Episode IV A New Hope" in the movie's opening crawl, officially rebranding the film as Star Wars: Episode IV A New Hope -- in its original release, it was simply called Star Wars.
The short trailer features clips from several scenes, including Han Solo blasting Stormtroopers on Tatooine, Luke Skywalker's encounter with Sand People, and the Millennium Falcon's escape from the Death Star. The trailer's narrator calls the film "legendary" and describes it as "the most popular film of all time" -- referencing the box office record for ticket sales held by Star Wars at the time.
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