for scene 46 of the video " The Incredible Experience vs Ice Age - part 1" by Rolf Witzsche
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It is a fact in basic physics
"You should be able to answer this yourself," Kepler would say. "Your teacher may have presented the answer in your physics class. It is a fact in basic physics that when an electric current flows in two parallel wires in the same direction, the wires attract one another by magnetic interaction, termed the Lorenz force. While wires are typically held in place, the flowing electric plasma in space gets pinched together by the attracting electromagnetic forces, which thereby increases the electric density and the resulting magnetic fields, which in turn increases the pinch effect still further. This goes on until the magnetic fields get all tangled up.
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Published by Cygni Communications Ltd.
North Vancouver, BC, Canada - (C) in public domain - producer Rolf A. F.