The filmmakers were given pretty much unrestricted access to the NASA film archives. Much of the footage used contains alternative camera angles and footage that has not been used before in any other moon landing documentary. The film footage was preserved in ideal archival conditions by NASA since it was shot fifty years ago so needed very little restoration work because of this.
One small step for man... one giant leap for mankind.
When the returning Apollo 11 blasts away from moon orbit, there is a dual visual display showing elapsed rocket burn time and spacecraft speed. The speed rapidly increases to just over 5500 mph during the rocket burn, and then the rocket cuts off. But the speed continues to increase for a few more moments. In reality, the speed would have stopped increasing the instant the rocket cut off. This is not an error as the residual bleed of the engine slowly being shut off will result in a slight continuation of acceleration.
In 2019, an edited version of the film, cut down to 45 minutes for exhibition in museum IMAX theaters, was released as Apollo 11: First Steps.
$1,607,040 3 March 2019