The NFL's magic yellow line, explained

Name: The NFL's magic yellow line, explained
Uploaded: 2016-02-08T22:35:51+00:00
Description: The clever engineering behind the virtual first-down line. Subscribe to our channel! http://goo.gl/0bsAjO --- Since the late 1990s, the virtual yellow...

Collected by marco34523 on Feb 8, 2016

The clever engineering behind the virtual first-down line. Subscribe to our channel! http://goo.gl/0bsAjO --- Since the late 1990s, the virtual yellow...

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