You could be right and it could be a compilation of film clips in the first video. I found the clip that appeared to be on the World at War series, plus the also 2nd clip. I know that some kitchen utensils were made from helmets post WW2 and it could be that some Luftschutz helmets were made from kitchen utensils during WW2. The radial band round the Luftschtz type helmet would have to be "rolled/spun" on the helmet as it would not be possible to form it on in a press.