A clip from "It's All True" labels the film as "Unreleased." In fact, it was completed and distributed by Paramount in 1993.
The filmmakers explicitly state at the end of this documentary that the greatest contribution of 'Other Side of the Wind' may be that Orson Welles created the modern documentary film. While we can debate whether that was his intent with OSOTW, the fact is that documentaries have been around since before the 1920s. Documentaries were always very popular way before Orson commenced work on OSOTW. No attempt is made to illustrate why OSOTW may have changed the way we view documentaries from before that time (assuming they meant to say Welles changed the style of documentaries, as opposed to claiming he created documentaries in general, which may be a generous interpretation).
Several people interviewed in this documentary claimed that Orson Welles may never have intended to finish his film 'Other Side of the Wind'. However, several key reasons why the film was not completed - including the 1979 Iranian Revolution, a complete failure to raise any additional capital after his AMA award speech and a legal dispute over ownership of materials - could not have possibly been foreseen by Welles. Moreover, he would not put all the effort into bringing an expensive lawsuit if the ownership dispute conveniently served his original purpose of never finishing the film. If the lawsuit and the failed capital raise were all part of the plan for making an interesting film, no evidence is presented to support this assertion (nor do the filmmakers explicitly state this was the case).