he is right, but he doesn't say that 96 % of all UFO sightings are perfectly natural phenomena and man made artifacts. The other 4 % remain unidentified for lack of enough research or because are just hoaxes.

It's curious that the believers are not scientists. They belong to the UFO Industry. In other words they sell faked pics. unreliable events, nonsense, fiction presented as fact, pseudo-science and even some New Age rhetoric.
They will give us words, because they talk,talk,talk and write the same empty book again and again.
A rational, informed individual, after one of these empty, contradictory, misinformed lectures, sees clearly that there is nothing behind the empty words.

Some people pay for this and they pay because they want to believe, but belief is not knowledge.

http://bluebookarchive.org/
Just take a look, read, learn what others say.
The Project Blue Book Archive provides researchers
with free online access to over 50,000 official US
Government documents relating to the UFO phenomenon.
A search engine and various indices are also
provided to modernize access to these documents.
All this is FREE.
Before believing the unsubstantiated hypothesis of these individuals who make a living selling all
this, go to the Blue Book Archive. Also find the rational, concrete solution of the so called UFO phenomenon. Follow links, please.
http://en.wikipedia.org/wiki/Psychosocial_hypothesis
http://ufoculture.blogspot.com/2014/02/ufo-psychosocial-hypothesis.html
http://www.examiner.com/article/is-ufology-ready-to-apply-critical-thinking