LOS ANGELES — A Canadian filmmaker, Barry Avrich, whose effort to make a documentary about Harvey Weinstein ended in 2011 with an online-only movie that he says was watered down, has decided to try again.

Mr. Avrich said on Wednesday that he will rework his documentary, “Unauthorized: The Harvey Weinstein Project,” in the wake of sexual harassment and rape allegations against Mr. Weinstein. “I have a moral obligation to edit and expand my film, and not just by tacking on an 11-minute ending about him as a sexual predator,” Mr. Avrich said by phone from Ottawa.

But Mr. Avrich must first contend with IFC Films, a division of the publicly traded AMC Networks. IFC bought distribution rights to “Unauthorized: The Harvey Weinstein Project” for an undisclosed amount in September 2010. Mr. Avrich has long asserted that IFC subsequently asked for sanitizing trims and decided against a theatrical release as a favor to Mr. Weinstein, who was then one of Hollywood’s most powerful men.

IFC has repeatedly denied Mr. Avrich’s claims. In a statement on Wednesday, the company wrote: “The film was at various times on Netflix, iTunes and our own streaming service. We believe we provided appropriate distribution for it, as we do for the six to eight documentaries we distribute each year. We asked the filmmaker to eliminate 30 seconds of the film, which we did not believe was central to the story.”