If you liked Spinal Tap you'll love this, very similar in style. It plays like a documentary, presenting the most ludicrous opinions and over the top exaggerations of academics, yet plays it serious and with a straight face the whole time.
One of my favorite bits is when describing how folks in the "olden days" would have attributed these to the devil or supernatural evil out of ignorance, people today do the same by assuming it is... wait for it... a hoax! Brilliant timing in the delivery.
Some of the dialog is a little over the top and drags out a but, but still funny.
The caricatures are brilliant, they hit all the classics. The smoking, gravely voice lady spouting pretend science about unrelated minutia with her boxes of "evidence". The British 'philosopher' who continually spouts 'deep' thoughts in what he clearly thinks profound, (kind of plays it like a Hugh Laurie creation from A Bit of Fry & Laurie), but utter nonsense. The 'Glickman' character at the beginning and end who is a classic stereotypical paranoid/ delusional who at home pushing a shopping cart around a downtown area asking for change and complaining about the transmitters in his teeth. (his bit at the start about being affronted by thing represented by initials). And last but not least the computer geek, with his talk about 5 dimensional space and silly animations. All the talk about the "advanced math" is just great. All these apparently educated, academic types who are just amazed and astounded by grade school geometry. Almost a Monty Python feel at that point.
And ironic fun with title is brilliant as well, "quest for the truth". I don't think once they ever mention or bring up or dismiss the simple truth, but instead have 5 dimension crafts flying through the earth and every other crazy other explanation they can dream up.
It also reminds be a bit of Comic Book : The Movie. In the sense that while they are completely mocking the crop circle nuts, they never really get mean about it. It is funny and light hearted.
Definitely a fun watch. My only minor complaint is that is a little long in parts.