The YouTube video thumbnail features a person in a blue shirt outdoors, pointing at a setup involving a red wire spanning across the image. A metal funnel-like object is attached to a wooden support on the left. The background shows green grass and trees. Bold text at the top reads “How does this even work?” in red, while an arrow points to the wire with the words “One Wire?” in white.

⤑ Electricity Doesn’t Actually Need a Return Wire.

I learned something new.

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