As for the movie, it at minimum, warrants serious investigation by the authorities. I think the problem is that True the Vote, and many others, don't trust the FBI, DOJ, or other authorities to do their jobs. What concerns me is drop ballot boxes and ballot harvesting creates situations where 3rd parties are involved that have a huge stake in the game and situations where the voting process is completely unsupervised and out of watch by poll watchers.
I was suspicious when Atlanta, Detroit, Philadelphia, and Milwaukee all stopped counting at the same time for several hours. The reason you do that is to get all the Trump votes in to see how many you need to produce. Unfortunately, though people's instincts were right, the theories that abounded in the first two months were wrong. And that has made people hesitant to get back into this. I just worry if we don't fix it, our elections become almost like a 3rd world country.
One thing fact-checkers have pointed out that is hysterical to me is questioning the accuracy of cell phone tracking data. The NY Times said it was accurate, the CDC said it was very accurate tracking COVID patients, and the Supreme Court Justice Roberts said it was incredibly accurate when talking about another case. We have cell phone tracking data backed up by surveillance data. Mules show up exactly at the times you'd expect them to in the videos.