The common practice when seeking to diss something is to spend the first half building it up, then when the viewer feels they are watching the work of a professional who is only interested in the truth, they tear it all down and dissmiss it as ‘sadly, a hoax’. It is common to the UFO issue when any alphabet network takes up the subject. The skepticism regarding anything UFOish is proof the manipualtion works.
My distinct impression was the first 40 minutes, counting commercials, was done by completely different producer and director. The tone and shooting technique were different. When it shifted back to the piece on the Sudarium of Oviedo, the original tone and shooting technique were returned. I think that 10-15 minute segment was cut in without the knowledge of the other producer and director or without their input. Someone's idea of "balance".