Winners Tape All: The Henderson Brothers Story (2016) on Netflix

Plot summary

In the 1980s, stepbrothers Michael and Richard Henderson of West Virginia spotted the growing market for VHS tapes and began shooting their own horror movies in the backyard. They titled them The Curse of Stabberman and Cannibal Swim Club. For years the tapes were forgotten, until a resurgence in collecting rare horror videotapes brought the Henderson Brothers back into the spotlight. Their biggest fan set up their first on-camera interview, and the pair sit down to look back over the movies they made. The verdict, as they go through them, is that the old work may not be as strong as they recall.