I really don't know why I put myself through the pain of watching this nonsense.
I'm a physics professor and researcher, and I've made kind of a hobby of studying free energy scams, so I'm very familiar with Mr. Newman. When I give talks on the subject, I frequently used clips of him to demonstrate "technical sounding gobbledygook". He sounds pretty rational in this movie - at least at first, but if you go to YouTube, he makes it clear that he has no understanding of even the most basic concepts of work and energy.
The documentary trots out a whole host of "experts" who turn out not to be experts at all. For example they rely a lot on a guy named Evan Soule, Jr, who is identified as a "physicist"; however, if you search, you'll find that the only thing he's ever done is to work for Newman.
Although there's no narration, the makers also appear to accept everything Newman and his supporters at at face value, even when the counter-evidence is right in front of there eyes. For example, at one point, they say his machine is running on a "few batteries", while holding up a couple of AAA cells. Later, we see that it's actually running on a very large bank of batteries, and no one seems to comprehend that there's nothing particularly impressive about that. Indeed, if you know anything about Newman, he never understood that putting a lot of batteries together can produce a lot of power. In one of his YouTube videos, he's very impressed that he can power a pickup truck (at about 1 mph) using "only" 6 12-V car batteries.
The fact is that the NBS did test Newman's machine and found that it was a rather inefficient motor. End of story. All that stuff about "grounding the motor" was just nonsense.
The documentary tries to make it seem like not getting the patent kind of drove Newman crazy, but the fact is he was always just a pathetic nut who wasted his entire life working on nonsense.
Here's the bottom line: if a motor puts out more energy than it takes in, then you can connect the output to the input and run it without an external energy source. In all the years Newman hawked his "motor", he never did that. Because he couldn't. Because it didn't work. Period.