Still desk bound (and unable to hear audio/video of tape excerpts) and wonder.......In addition to camera shyness, could it be that he understood the magnitude of the message IF and ONLY IF the message was a harbinger of nasty things to come. Hate to be pessimistic, but there are too many unorthodox things about how this tape has come out.
He didn't strike me as being camera shy at all; he struck me as someone filled with zest but it all seemed a bit scripted yet less than flawless.
Anyone who does acting or public speaking or meeting presentations will recognize that he was a tad nervous and this made him breath heavily, loudly and frequently. His nervousness came out in these ways; not in making him camera shy or hesitant.
Also, the way he stuck his fingers up at one point seemed entirely scripted to me. This is all just my opinion.