This pic from the Alyea footage shows the moment Day has turned to Fritz who is yet to reach for the bolt handle.
I believe the red arrow picks out the bolt handle in the "unlatched" position that is seen more clearly in other pictures posted:

I believe this bolt handle was in the "unlatched" position when it was picked up because it appears to be in this same position before Fritz takes out his handkerchief and reaches for the bolt handle.
I agree Dan, Nobody touched that bolt handle from the time Day picked the carcano up FROM THE FLOOR until Fritz slid the bolt back and the live round dropped out,...... The bolt is in the unlatched position in Alyea's film because the yokel who hid the rifle didn't know that the live cartridge had to be fed up to the bolt by the cartridge elevator pushing it up into the annular space on the face of the bolt. ( NOTE:.... If that live round had been the last cartridge in the clip the elevator would have been in contact with it, and when the three previous cartridges were fire that elevator would have scratched the live round, but there was no sign that te live round had been in contact with the elevator. )
The yokel simply dropped the live round into the chamber and then couldn't get the bolt closed and latched, so he left it just as it is seen in the Alyea film.