I do like that there's a "well, let's do an experiment" tone. If folks want to assert that "praying is real", their should be camps all over the place in competition to be the first to detect the transmissions. There should be some way to objectively find the mechanism of prayer. There should at least be some statistical benefit shown to exist from prayer, tabulated with error bars and the whole works.
Whether accidental, I felt the undertone of religious discussion in this video, also. Boris may have brought it to surface explicitly. It could even have been the intent of the producers to leave that issue sort of open. One can take from it that plenty of things exist beyond human perception and leave it at that. Or one can hopefully see that, through science, we join forces and stand on the shoulders of giants to see ever farther. It is through sharing useful information that our understanding of the world is enhanced. Imagination, alone, is not enough!