Those old black and white television cameras had a lot of limitations. For instance, things that were white and glossy would cause an extra-bright flare effect that would leave trails across the screen whenever it moved, and it was even worse on video. Guitar companies had to invent a brand new shade of yellow for musicians who performed on TV that still looked white on camera, but didn’t light up like a road flare under the studio lights.

Which is a long way of saying that when it comes to those old cameras I would expect the light from a blowtorch to cause some weird artifacts.