Hello Mike,
There might be no chance of that happening (they certainly have taken photos, however, movie clips I'm not sure about). Automobile production methods etc. were fairly sicretive back then. Guess we have to just be happy with some photos and imagine the rest. We can be certain that most of the work was hand build (not like todays work all robot supported).
In 2008 I visited the factories of BMW, VW and Mercedes it was most interesting (it was one item on my bucket list and I enjoyed it immensely). I went into the VW Glass Factory in Dresden and they insisted I return my camera to the car, so I did. Now they have a video on the Internet (how things change in a few years) see the clip below. This factory tour and the Mercedes and BMW impressed me very much.
VW Glass Factory ---->
https://www.youtube.com/watch?v=YlIyDhss4CgOr this one in more detail --->
https://www.youtube.com/watch?v=nM2l0wqNVZ8A former business partner and I went to the Corvette Factory and Museum in Bowling Green Kentucky (before the museum floor swallowed several priceless corvettes). We took the VIP factory tour only four of us with 2 tour guides, it took 3 hours and we walked 3.5 miles of the assembly line. I sort of imagine that our Pagodas were hand build much like the Corvette back in the 60s. Some photos below, I'm sure you saw them before.
Everyone that loves cars and some day has a chance should make a factory tour or two
I highly recommend it.