One thing I did notice from the first video, is the use of HRC fuselinks for motors and the like in farm buildings.
Pretty common at the time here. Circuit-breakers in domestic and light commercial work didn't really start to become commonplace here until the 1980s.
BTW, did anyone else notice, that the first plug in the video had two black wires, but not a green earth wire?
The one from about 2:50 - 3:05 in part 1? The earth does look green on my monitor, albeit a very dark green. It's probably a combination of a faded 16mm print plus a little further degradation on the transfer to video.
