It's not needed for everybody to watch this footage, summary video can be presented. It just should be linked somewhere for those who want to see the results and verify summary themselves.
It might be enough. Like open source - not everybody needs to read the source code, it is enough when one knowledgeable person does that and makes a stink when they find something fishy.
Very much this. "The average person won't ..." is a huge fallacy. This also applies to repair (that knowledgeable people are able to do it is enough because they can sell it as a service at economically viable prices).
The footage is for verification only. No one will watch the whole thing, but people can scan through it and notice if the conclusion most people are giving different from the edited shorter final production video.