The only reason this gets anything beyond a 1 star rating is because of the efforts in production. Otherwise, from a journalistic perspective, giving this the title of 'documentary' is offensive.
The documentary covers the account of events that happened near my home town of Ottawa where several witnesses saw lights and presumed the origins were extraterrestrial. The whole time it was an active area for military operations and training exercises because of its proximity to the Diefenbunker and a military base.
Gee, military operations at night, in the late 80s, early 90s and you see lights? Well, I hope you solve that mystery!
And you had one source of it all, some mysterious person known as 'The Guardian' who sent a tape of a recording in the middle of the night that looks like some cheap strobe light was present. Let me solve that for you right now. It's Bob Oechsler.
Considering what psychology has learned from the reliability of memory, priming and the like, this 'investigation' is nothing more than conspiratorial nonsense.
No military personnel or testimony was recorded and no exploration outside of confirmation bias was done.
Avoid this one, it's sheer garbage.