I'm forced to admit you may be right Coz... it could be a D-21.
It surely has that Brazilian rosewood *zing*, but if so, it's also newer than we (me and aforementioned buddy) thought. Style 21 wasn't available in a Dreadnought until 1956. And those white button tuners just scream wartime. Of course they could've been switched too, but then the question becomes why put such obviously incorrect tuners on a fairly rare guitar.

The video quality isn't sharp enough to tell if it has metal bushings for the posts... that would at least be conclusive, as the wartime guitars are the only ones without.
Doesn't look like the right color tortoise 'guard for a '42 either. Looks more like that god-awful reddish '47-'49 stock. (My 1950 is almost totally black, with little purple-ish swirls) Again, could've easily been switched.
Sure looks like an ebony fingerboard and bridge too, which would eliminate 21... Style 18 had ebony trim until about 1948, when it was switched to rosewood trim, Style 21 followed suit.
Shoot... part of me wants it to be a hosed-up D-21 now!

Whichever it is, good golly, that guy is haulin' the tone out of it by brute force.
~Gregory (who is thankful it's not just him that dwells on this stuff...)