Steven Spielberg is marking the 20th anniversary of his Oscar-winning movie Schindler's List by launching a competition for high school students.

The legendary director has helped put together the IWitness Video Challenge to encourage youngsters to do more for their communities.

The initiative, which is backed by Spielberg's USC Shoah Foundation, urges pupils to engage in community service based on testimony of the real-life Holocaust survivors who were saved by Oskar Schindler in the story that inspired the 1993 movie.

Participants are asked to showcase their efforts in a short film and the winner will be invited to present the video at the charity's gala event in Los Angeles.

Spielberg says of the scheme, "The idea behind the challenge is the same idea as what was behind Schindler's List. That profound change can occur when even one person makes a positive choice... I implore educators not to allow the Holocaust to be a footnote in history, please teach this in your schools."