Basis of Evidence?
Around minute 37 of the video, when the 3 NG crashes were cited as evidence for the whistleblowers case is the point where the video became nonsense IMO.
The layout of the emergency light battery packs is such that when the fuselage breaks into 3 pieces following an impact, all 3 pieces still have emergency lights. Falling into 3 pieces is an expectation upon impact and not limited to the NG.
The parts that are discussed in the video are inspected during the life of the NG so the potential issues are covered.