Their contribution to resolving play reviews is limited. But pylon cameras - used by CBS in its coverage of AFC playoffs game last weekend - provided fans an engaging, up-close-and-personal glimpse of action around the end zone (in some cases before being run over by approaching players).

Pylon cameras don't completely satisfy those calling for fixed perimeter cams to help with officiating - especially in and near the end zones. Pylon cameras, used by broadcasters for college and pro telecasts, do however, add captivating video for the viewing audience.

Read More.