The balls are lined up under the action of high voltage in castor oil. I found this experiment interesting. I applied a voltage of about 30 kV (perhaps no more than 30 kV) and as a result, the metal balls begin to line up in the kind of chains that you see in this video. The balls create various structures that I can't explain to you yet. What do you think about this? Write your answer in the comments! Happy New Year! Sincerely, Yuri Kovalenok