SO....WHY IS HE FILMING THIS....
....(and so artfully) at the beginning, if he doesn't know he's going to discover something that will propel a full feature film?
.
And how is he going to know that beforehand?
My ignore list is much too long for a sig line. Do not assume you are not on it.
My theory:
The guy's profession is documentarian. My guess is that he probably started filming it as a keepsake for himself, not knowing he'd find anything.
Alternate answer: He didn't start filming it. When he realized he had something, he re-enacted the scenes so that he could make a complete documentary.
Paul