The film was not financed by crowdfunding, contrary to popular belief. The Kickstarter campaign was aimed solely at preserving and restoring the contents of the Zappa vault. The film that resulted from that preservation was itself financed by conventional backers.
Other than the fact this documentary was directed by Alex Winter, a self-proclaimed Frank Zappa fan, the "Bill & Ted" franchise where Winter plays Bill has at least two connections with Zappa. One of Frank's sons Dweezil Zappa co-wrote the song "Two Heads Are Better Than One" by Power Tool for the soundtrack of L'Excellente Aventure de Bill & Ted (1989), while Steve Vai (who worked with Zappa from 1980 to 1983) contributed to two songs for the soundtrack of the follow-up movie Les folles aventures de Bill et Ted (1991): "The Reaper" and "The Reaper Rap".