Wanna Know How That Yellow First-Down Line on Your TV Works? (Video)

Yellow First-Down Line

The yellow first-down marker that appears on our television sets during football contests is one of the greatest innovations man has witnessed over the past couple of decades.

So how did it come to be?  If you’ve ever asked yourself that question, and if you’ve got approximately five minutes to spare, you’re in luck because Vox has created a video that should help explain everything you need to know about that awesome yellow first-down line.

Check it out:

Tags: first-down line, football, NFL,