This video answers one of the greatest sports mysteries of all time. How do they put that little yellow line on the football field?

That yellow line is invaluable when watching a game on television. You never have to guess where the first-down line is. This makes games so much easier to follow. And it really ramps up the tension during close contests.

But putting that line in the broadcast is no simple task. You’ll be amazed by the amount of technology behind such a little thing. Sports fans won’t want to miss this one.

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