How the NFL's magic yellow line works

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Sneed's forced fumble, McCaffrey's touchdown among the plays that

Yellow Line

How Do Networks Show the First-Down Line on Televised Football Games?

How do they make the first down line appear on the football field

The Story Behind the NFL's Magic Yellow First-Down Line - Insight

History of Augmented Reality - svarmony

Everything is on the line (actually, on the offensive and defensive lines of the Chiefs and Eagles) in the Super Bowl - The Boston Globe

How do they superimpose the first-down line onto the field on

The Yellow Line - that won an Emmy - by Guy Boggan

Just How Does That Yellow First Down Line Work?